Hooke’s law, stress and strain: Edexcel International A Level Physics questions

Every Edexcel International A Level Physics exam question on Hooke’s law, stress and strain (specification points 27–32), 2019–2025, with its mark scheme and examiner’s report.

All 148 questions on Hooke’s law, stress and strain, as a list

June 2025, AS Unit 1, Q15(a) (3 marks): Determine the increase in elastic strain energy in the brick as the force increases from 85 N to 140 N. (3) Increase in elastic strain energy =
June 2025, AS Unit 1, Q15(b) (1 mark): The brick undergoes elastic deformation. State what is meant by elastic deformation. (1)
June 2025, AS Unit 1, Q17(a) (4 marks): A force‑extension graph for a sample of one of the strings is shown below. 80 60 Force / N 40 20 0 0 10 20 30 Extension / mm The table shows the stiffness for s
June 2025, AS Unit 1, Q17(b) (5 marks): The fourth string on the violin has an original length of 0.750 m. When the tension applied to the string is 36 N, the new length of the string is 0.752 m. The
January 2025, AS Unit 1, Q1 (1 mark): Stress is applied to a sample of a material. The stress is increased until the sample breaks. The graph shows the relationship between stress and strain for the
January 2025, AS Unit 1, Q4 (1 mark): A spring is stretched beyond its elastic limit. The applied force is then removed. Which of the following describes the behaviour of the spring? A The extension
January 2025, AS Unit 1, Q6 (1 mark): When a force F is applied to a spring of stiffness k, the extension of the spring is Δx. A force 2F is applied to a second spring of stiffness 3k. Which of the
January 2025, AS Unit 1, Q17(a) (2 marks): The original length of the sample was 36.8 m. Calculate the strain in the sample when the length of the sample increased to 38.1 m. (2) Strain =
January 2025, AS Unit 1, Q17(b)(i) (4 marks): The diameter of the sample is 220 mm. Determine the force applied to the sample when the strain was 0.025 (4) Force =
January 2025, AS Unit 1, Q17(b)(ii) (3 marks): Explain how the area under the stress-strain graph and the volume of the sample can be used to determine the energy stored. (3)
January 2025, AS Unit 3, Q2(a)(i) (4 marks): Describe a method the student could use to determine an accurate value for the maximum force a beam can support. You should include the use of any additional ap
October 2024, AS Unit 1, Q7 (1 mark): A student applies a force to stretch a thin metal wire. Which of the following describes the wire at the elastic limit? A The wire is elastically deformed. B Th
October 2024, AS Unit 1, Q12 (2 marks): A student has a spring of length 0.18 m. The spring has a stiffness constant of 25 N m −1. The student applies a force of 7.0 N to stretch the spring. Calculate
October 2024, AS Unit 1, Q17(a) (6 marks): Explain how the acceleration of the student changes as she moves from Position A to Position C. Assume that air resistance is negligible. (6)
October 2024, AS Unit 1, Q17(b) (4 marks): The bridge is above a river. The student will reach the river if the rope stretches to a total length of 35 m during the bungee jump. The student has a mass of
October 2024, AS Unit 1, Q18(a) (3 marks): The stress in one thread was 4.3 MPa. The radius of the thread was 1.9 × 10 −6 m. Calculate the force applied to the thread. (3) Force =
October 2024, AS Unit 1, Q18(b) (4 marks): The scientist investigated a thread of length 25.0 m. Determine the length of this thread when stretched to its limit of proportionality. Young modulus of spide
October 2024, AS Unit 1, Q18(c)(i) (2 marks): The sketch graph shows the stress-strain relationship for the spider silk up to its limit of proportionality. Stress Strain Add a line to the sketch graph to sh
October 2024, AS Unit 1, Q18(c)(ii) (3 marks): A sample of the steel has the same shape, length and cross-sectional area as a sample of the spider silk. Each sample is stretched to its limit of proportionali
October 2024, Unit 5, Q19(a)(i) (3 marks): Show that the stiffness of the spring is about 45 N m –1. (3)
June 2024, AS Unit 1, Q5 (1 mark): Which of the following expressions gives the stiffness of the spring? − A q p R q B R C R q R D q − p
June 2024, AS Unit 1, Q6 (1 mark): Which of the following expressions gives the work done stretching the spring from its original length p to length q? × p R A 2 q p R B 2 q p R C 2 D q p R
June 2024, AS Unit 1, Q9 (1 mark): A student attached one end of a wire to a support. The student added masses to the other end of the wire, as shown. The student measured the corresponding exten
June 2024, AS Unit 1, Q16(a) (6 marks): The student clamped one end of a copper wire to the bench. The wire passed over a pulley and masses were added to the other end of the wire. A metre rule was fi
June 2024, AS Unit 1, Q16(b) (4 marks): Another student attaches a weight of 5.0 N to a copper wire of diameter 0.56 mm. Calculate the extension of the wire. length of wire = 2.5 m Young modulus of co
June 2024, AS Unit 3, Q1(a)(ii) (2 marks): Describe a method the student could use which would not include a force meter. You should include the use of additional apparatus. (2)
January 2024, AS Unit 1, Q1 (1 mark): Which of the following is an SI unit for stress? A kg m −2 B m 2 kg −2 C m 2 N −1 D N m −2
January 2024, AS Unit 1, Q3 (1 mark): A spring is stretched by applying a force of 3.0 N. The elastic strain energy stored by the spring is 0.04 J. Which of the following expressions gives the exten
January 2024, AS Unit 1, Q7 (1 mark): A force is applied to stretch a spring. The graph shows how the length of the spring varies with the applied force. Applied force 0 Length of spring Which of th
January 2024, AS Unit 1, Q9 (1 mark): A force is applied to stretch two wires, P and Q, until the wires break. Each wire is made of a different metal. The stress-strain graph for each wire is shown.
January 2024, AS Unit 1, Q11(a) (1 mark): State how the graph shows that the rubber band deformed elastically. (1)
January 2024, AS Unit 1, Q11(b) (3 marks): The work done on the rubber band as F increased is greater than the work done by the rubber band as F was decreased. There is a difference in these values becau
January 2024, AS Unit 1, Q17(a) (2 marks): The student used a micrometer to measure the diameter of the wire. Describe how the student should • check that the wire is uniform • check that the wire has a
January 2024, AS Unit 1, Q17(b)(i) (2 marks): The student kept his feet away from the apparatus so that the masses could not fall on his feet. Explain one other safety precaution. (2)
January 2024, AS Unit 1, Q17(b)(ii) (2 marks): Each time the student added more mass, Δx increased by a few mm. Explain why he should measure Δx using a vernier scale, instead of a metre rule. (2)
January 2024, AS Unit 1, Q17(c) (5 marks): For each mass added, the student determined the force on the wire. The student plotted the graph shown. 12 10 8 Δx / mm 6 4 2 0 0 5 10 15 20 Force / N The table
January 2024, AS Unit 3, Q3(d) (2 marks): In a different experiment, the student applied force to stretch the hair. He determined the average breaking stress for hair as 181 MPa with a percentage uncert
October 2023, AS Unit 1, Q3 (1 mark): Which of the following could be used to describe the elastic limit of a material? A The stress above which the material will not obey Hooke’s law. B The stress
October 2023, AS Unit 1, Q8 (1 mark): A student applied a tensile force to a metal wire of length x and diameter d. The length of the wire increased by Δx. The student applied the same force to a se
October 2023, AS Unit 1, Q16(b)(i) (4 marks): When the object is suspended, the strain in the cable is 3.0 × 10 –4 Calculate the Young modulus of the steel in the cable. cross-sectional area of cable = 5.1
October 2023, AS Unit 1, Q16(b)(ii) (5 marks): The force‑extension graph for the steel cable is shown below. Force total weight of electromagnet and steel object 0 Extension When the electromagnet is switche
June 2023, AS Unit 1, Q3 (1 mark): A student applies a force to a copper wire. Which row of the table shows the length and diameter of wire that would produce the greatest extension? Length of wi
June 2023, AS Unit 1, Q4 (1 mark): A force‑extension graph for a spring is shown. 3.0 2.0 Force / N 1.0 0 0 0.10 0.20 0.30 0.40 Extension / m Which of the following gives the work done, in joules
June 2023, AS Unit 1, Q10 (1 mark): Two identical springs are arranged in series. A force of 45.0 N is applied to the springs, as shown. 45.0 N The springs extend a total distance of 15 mm. Which
June 2023, AS Unit 1, Q20(a) (1 mark): The force on the cable must not cause the material of the cable to reach its yield point. State what is meant by the yield point of a material. (1)
June 2023, AS Unit 1, Q20(b)(iii) (4 marks): To make sure the actor is safe, the stress in the cable must be less than 15% of the yield point stress. The cable has a yield point stress of 2.5 × 108 Pa. The
June 2023, AS Unit 1, Q20(c) (4 marks): The original cable is replaced with a new cable made from a different material. This material has a lower Young modulus than the material used to make the origi
June 2023, AS Unit 3, Q4(c)(i) (2 marks): Explain why a graph of cos 2 Δx can be used to determine a value for g. (2)
June 2023, AS Unit 3, Q4(c)(ii) (6 marks): The student recorded the following data. θ cos 2 Δx / m 0.938 0.165 0.926 0.169 0.911 0.175 0.902 0.178 0.891 0.183 θ on the y‑axis against 1 Plot a graph o
June 2023, AS Unit 3, Q4(c)(iii) (3 marks): Determine the gradient of the graph. (3) Gradient =
June 2023, AS Unit 3, Q4(c)(iv) (2 marks): Determine a value for g from the gradient of the graph. m = 1.20 kg k = 145 N m –1 (2) g =
January 2023, AS Unit 1, Q9 (1 mark): A student carries out an experiment to determine the Young modulus of copper. The student adds known masses to a copper wire and measures the corresponding exte
January 2023, AS Unit 1, Q14(a) (1 mark): State what is meant by elastic deformation. (1)
January 2023, AS Unit 1, Q14(b)(i) (2 marks): Show that the Young modulus for this metal is about 2 × 10 (2)
January 2023, AS Unit 1, Q14(b)(ii) (4 marks): The metal part must not compress more than 0.60 mm when a force of 9.5 × 10 5 N is applied. Deduce whether this metal is suitable for the part. length of part =
January 2023, AS Unit 1, Q15(b)(ii) (2 marks): The extension of the spring was 4.6 × 10 Calculate the stiffness of the spring. (2) Stiffness =
January 2023, AS Unit 3, Q3(a)(i) (2 marks): The value of l0 was 5.2 cm. Explain why a metre rule is an appropriate instrument for this measurement. (2)
January 2023, AS Unit 3, Q3(a)(ii) (2 marks): The student added a load to the spring and measured the stretched length l of the spring, as shown. support spring l metre rule load Describe two techniques the
January 2023, AS Unit 3, Q3(b)(ii) (2 marks): The student plotted the graph shown opposite. Explain which value he should check. (2) 0.8 0.7 0.6 0.5 W / N 0.4 0.3 0.2 0.1 0 4 5 6 7 8 9 10 11 12 13 14 15 16
January 2023, AS Unit 3, Q3(b)(iii) (1 mark): The student replaced the load with a small piece of modelling clay, as shown. support spring l modelling clay He measured l to be 8.4 cm. Determine the weight W
October 2022, AS Unit 1, Q5 (1 mark): A sample of a material is in the form of a wire. The material has a large value of the Young modulus. Which of the following statements best describes the mater
October 2022, AS Unit 1, Q6 (1 mark): A rubber band is initially stretched by an increasing force. When the force is gradually decreased, the rubber band returns to its original length. The force-ex
October 2022, AS Unit 1, Q8 (1 mark): When a certain spring is stretched by a tensile force F, the elastic energy stored in the spring is E. Three of these springs are arranged in parallel and stret
October 2022, AS Unit 1, Q12(a) (3 marks): The student had enough slotted masses to apply a weight of up to 150 N to the wire. The breaking stress for constantan is about 420 MPa. Deduce whether the wire
October 2022, AS Unit 1, Q12(b)(i) (2 marks): Show that the stiffness of the wire is about 1.3 × 104 N m–1. (2)
October 2022, AS Unit 1, Q12(b)(ii) (2 marks): The relationship between the stiffness k of the wire and the Young modulus E is given by EA k = x where x is the unstretched length of the wire and A is the cro
October 2022, AS Unit 3, Q4(a) (2 marks): Criticise the recording of these results. (2)
October 2022, AS Unit 3, Q4(b) (5 marks): Using the grid opposite, plot a graph of d on the y-axis against F on the x-axis. (5)
October 2022, AS Unit 3, Q4(c)(i) (2 marks): The ‘bending modulus’ E of the plastic beam can be calculated using the equation l F 3 E = wh d 4 3 l 3 Show that the gradient of the graph is equal to wh E 4 3
October 2022, AS Unit 3, Q4(c)(ii) (2 marks): Determine the gradient of your graph. (2) Gradient =
October 2022, AS Unit 3, Q4(c)(iii) (2 marks): The student recorded the following measurements for the plastic beam. l / cm 30 w / mm 20 h / mm 10 Determine E, in GPa, for the plastic beam. (2) E = GPa
October 2022, AS Unit 3, Q4(d) (2 marks): The student’s teacher suggested that using a plastic beam with a smaller value of h would improve the measurement of d. Justify the teacher’s statement. (2)
June 2022, AS Unit 1, Q4 (1 mark): The graph shows the relationship between tensile stress and tensile strain for a material. breaking point Tensile stress elastic limit Tensile strain Which of t
June 2022, AS Unit 1, Q7 (1 mark): Two arrangements, P and Q, of identical springs are subjected to the same tensile force F as shown. Q P F F F F When one spring is subjected to a tensile force
June 2022, AS Unit 1, Q10 (1 mark): When compressed by a force of 50 N, a spring had a length of 12.0 cm. When compressed by a force of 70 N, the same spring had a length of 7.1 cm. Which of the f
June 2022, AS Unit 1, Q12(a) (1 mark): State what is meant by the elastic limit. (1)
June 2022, AS Unit 1, Q12(b)(i) (2 marks): Calculate the strain of the cable at its elastic limit. (2) Strain =
June 2022, AS Unit 1, Q12(b)(ii) (2 marks): Calculate the stress in the cable at its elastic limit. (2) Stress =
June 2022, Unit 5, Q17(b)(i) (2 marks): The board obeys Hooke’s law as it deforms. Show that the stiffness of the diving board is about 4000 N m–1. (2)
January 2022, AS Unit 1, Q8 (1 mark): A wire breaks when a tensile force T is applied. A second wire, made of the same material, has twice the diameter. Which of the following is the force required
January 2022, AS Unit 1, Q13(b)(i) (3 marks): Determine the strain in the rope while it is supporting the weight of the climber. You may ignore the weight of the rope. (3) Strain =
January 2022, AS Unit 1, Q13(b)(ii) (3 marks): The rope has a cross-sectional area of 3.14 × 10−4 m2. Determine the Young modulus of the rope material. (3) Young modulus =
January 2022, AS Unit 1, Q16(b) (2 marks): Determine the force on the ball when the spring is released. (2) Force =
January 2022, AS Unit 1, Q16(c) (2 marks): Determine the stiffness of the spring. (2) Stiffness =
January 2022, AS Unit 3, Q5(c) (2 marks): The student was given the following equation and data to find a value for the speed of sound in oak. E v = ρ Young modulus E of oak = 11.2 GPa ± 0.5 GPa Density
October 2021, AS Unit 1, Q3 (1 mark): Two different springs, S1 and S2, are suspended from a fixed support. Masses are attached to the bottom of S1 and S2 as shown. fixed support S1 S2 x 3 x 2m m Th
October 2021, AS Unit 1, Q14(a) (1 mark): State what is meant by the limit of proportionality. (1)
October 2021, AS Unit 1, Q14(b)(i) (2 marks): Determine the gradient of the graph. (2) Gradient =
October 2021, AS Unit 1, Q14(b)(ii) (3 marks): Determine the Young modulus of stainless steel using your value for the gradient. (3) Young modulus =
October 2021, AS Unit 1, Q14(c) (3 marks): The breaking stress for this stainless steel is known to be 480 MPa. Deduce whether it is safe for the student to increase the weight to 100.0 N. (3)
October 2021, AS Unit 1, Q15 (6 marks): * 15 The photograph shows a toy car that contains a spring. Pulling the car backwards along the floor compresses the spring. Energy is stored in the compressed
October 2021, AS Unit 3, Q3(a) (4 marks): Describe a method to determine the maximum force the nylon fishing line can withstand before breaking. (4)
October 2021, AS Unit 3, Q3(c)(ii) (5 marks): The student read an article that suggested nylon fishing line can absorb water. The article suggested that the ultimate tensile stress of nylon decreases by 10
October 2021, Unit 5, Q18(a)(i) (2 marks): When the crib supports a mass of 15.0 kg the spring extends by 42.5 cm. Show that the stiffness of the spring is about 350 N m−1. (2)
October 2021, Unit 6, Q4(c) (2 marks): The shear modulus G is a measure of a material’s resistance to bending, and is given by 32 mglx 2 G = π yd 4 where m is the mass attached to the end of the rod
June 2021, AS Unit 1, Q5 (1 mark): A compressive force F is applied to an object made of a material with Young modulus E. The original length of the object in the direction of the force is x, and
June 2021, AS Unit 1, Q9 (1 mark): A copper rod was placed under tensile stress and the tensile strain in the rod was measured. The graph shows how the tensile stress required to cause a tensile
June 2021, AS Unit 1, Q17(a) (2 marks): The greater the length of a rope, the smaller the stiffness of the rope. Explain why. (2)
June 2021, AS Unit 1, Q17(b)(i) (3 marks): Show that the stiffness k of the nylon rope is about 1.4 × 105 N m−1 . (3)
June 2021, AS Unit 1, Q17(b)(ii) (3 marks): The pulley system lifts the 5.00 kN weight at a steady rate. Determine the extension of the rope while the lift is taking place. (3) Extension of rope =
June 2021, AS Unit 1, Q17(b)(iii) (2 marks): Calculate the work done in stretching the rope. (2) Work done in stretching rope =
June 2021, AS Unit 1, Q17(c) (2 marks): Assess whether the stretching of the rope has a significant effect on the efficiency of the pulley system. (2)
January 2021, AS Unit 1, Q5 (1 mark): A student is investigating a material in the form of a wire. Which of the following properties of the wire will change if a longer wire is used? A breaking stre
January 2021, AS Unit 1, Q15 (6 marks): *15 In a bungee jump, the bungee jumper falls from a high platform while attached to an elastic cord. The cord is also attached to the platform. The cord slows
January 2021, AS Unit 1, Q16(a) (1 mark): State a suitable measuring instrument to measure the diameter of the sample. (1)
January 2021, AS Unit 1, Q16(b)(i) (3 marks): Determine the Young modulus of the sample. (3) Young modulus =
January 2021, AS Unit 1, Q16(b)(ii) (4 marks): The sample broke at point B. Determine the force required to break the sample. (4) Force =
January 2021, AS Unit 1, Q16(b)(iii) (3 marks): The graph below shows a linear section of the stress-strain graph for the sample. 0 Strain Show that the area under this graph represents the work done per unit
January 2021, AS Unit 1, Q16(b)(iv) (4 marks): The area under any stress-strain graph represents the work done per unit volume. Estimate the amount of work required to break the titanium alloy sample. (4) Wo
January 2021, AS Unit 1, Q17(a) (2 marks): The force meter allows force to be measured by means of Hooke’s law. The extension of the spring inside the force meter allows the stretching force to be read f
January 2021, AS Unit 1, Q17(b) (6 marks): When m is equal to 0.55 kg, the value of P is 8.5 N. Calculate the value of θ, and the extension of the spring in the force meter. (6) θ = Extension of the spri
January 2021, AS Unit 3, Q3(a) (5 marks): Describe a method he could have used to take the measurements. Your answer should include a diagram. (5)
January 2021, AS Unit 3, Q3(b) (3 marks): The student measured the extension as he was loading and unloading the rubber band. The graph shows his results. 10.0 9.0 8.0 7.0 loading 6.0 unloading 5.0 4.0
January 2021, Unit 5, Q18(c)(i) (1 mark): State what is meant by an elastic material. (1)
October 2020, AS Unit 1, Q8 (1 mark): A stress σ is applied across the ends of a wire of cross-sectional area A. Work W is done to extend the wire by ∆x. Which of the following could be used to dete
October 2020, AS Unit 1, Q16(a)(i) (1 mark): State the significance of point K. (1)
October 2020, AS Unit 1, Q16(a)(ii) (2 marks): Explain the significance of point L. (2)
October 2020, AS Unit 1, Q16(a)(iii) (1 mark): The graph for the unloading of the spring is also shown on the axes. Suggest why the unloading graph has a different gradient to the loading graph. (1)
October 2020, AS Unit 1, Q16(b) (1 mark): A second student repeated the investigation but forgot to subtract the original length of the spring from his measurements. Sketch, on the axes below, the shape
October 2020, AS Unit 1, Q16(c) (4 marks): A third student repeated the investigation using two new springs connected in series as shown. The springs were identical to the spring used in the original inv
October 2020, AS Unit 1, Q19(b)(i) (2 marks): Show that the Young modulus of steel is about 2 × 1011 Pa. (2)
October 2020, AS Unit 1, Q19(b)(ii) (2 marks): The pylons are positioned every 270 m. Show that the stress in a strand of steel is about 70 MPa. (2) cross-sectional area of one strand = 2.3 × 10−6 m2 tension
October 2020, AS Unit 1, Q19(b)(iii) (3 marks): ACSR cables consist of a steel core surrounded by strands of aluminium cable. The extension produced, due to the tension, for each strand of aluminium is 0.95 m
January 2020, AS Unit 1, Q9 (1 mark): A length of steel wire is fixed at one end. An increasing force is applied to the other end of the wire. The force extension graph for the wire is shown. P Q R
January 2020, AS Unit 1, Q14 (6 marks): *14 When concrete is placed under stress, cracks may form. Scientists are investigating ways to prevent cracks from spreading through the concrete. One way to d
January 2020, AS Unit 1, Q17(a)(i) (4 marks): Explain this prediction. (4)
January 2020, AS Unit 1, Q17(a)(ii) (3 marks): Determine the stiffness k of the elastic cord. mass of glider = 300 g (3) k =
January 2020, AS Unit 1, Q17(b) (2 marks): When the glider was moved to the right by more than 0.5 m, the graph began to curve. Explain why the shape of the graph changed. (2)
January 2020, AS Unit 1, Q18(a) (1 mark): State the meaning of the term Young modulus. (1)
January 2020, AS Unit 1, Q18(b)(i) (3 marks): Determine the cross-sectional area of the sample of wire used. (3) Cross-sectional area =
January 2020, AS Unit 1, Q18(b)(ii) (3 marks): The student plotted a graph of m against Δ x. She measured the gradient and obtained a value of 195 kg m−1. Determine the Young modulus of the copper. length of
January 2020, AS Unit 1, Q18(b)(iii) (2 marks): The experiment was repeated by another student, using a 2.00 m length of the copper wire. Suggest how the values obtained for the gradient and hence the Young m
January 2020, AS Unit 3, Q5(a) (2 marks): A teacher is given a sample of the same material with diameter 1 mm. Justify the teacher’s decision that it would be safe for her students to determine the brea
January 2020, AS Unit 3, Q5(b) (4 marks): To determine the breaking stress, a student used 100 g slotted masses hung vertically from the sample. The maximum mass that the sample could hold before breaki
January 2020, Unit 4, Q13(a) (2 marks): Show that the maximum energy stored in the compressed spring was about 0.1 J. (2)
June 2019, AS Unit 1, Q6 (1 mark): A graph of stress ı against strain İ, up to the breaking point, is drawn for four samples of wire, A, B, C and D. Which sample of wire has both a low elastic li
June 2019, AS Unit 1, Q16(a) (3 marks): Describe how the diameter of the wire should have been determined. (3)
June 2019, AS Unit 1, Q16(b) (4 marks): The student calculated the extension of the copper wire for each applied load. She then plotted a graph of load against extension. 10 – 8 – 6 – 4 – 2 – 0 – 0
June 2019, AS Unit 1, Q16(c) (6 marks): Explain why the sample of wire used in this experiment should be long and thin. (6)
June 2019, AS Unit 1, Q17(a)(i) (5 marks): Show that the maximum force acting on the climber due to the rope is about 10 kN. Assume the extension of the rope is proportional to its tension. total unstret
June 2019, AS Unit 1, Q17(b) (6 marks): Climbing rope manufacturers recommend that ropes are replaced every 5 years. The force-extension graphs, up to the breaking point, for a one metre length of a r
June 2019, AS Unit 3, Q2(a) (4 marks): Describe what the student should do to obtain the data to plot the force-extension graph. (4)
June 2019, AS Unit 3, Q2(b) (2 marks): Explain how you would use the graph to determine the stiffness of the spring. (2)
January 2019, AS Unit 1, Q7 (1 mark): One end of a 50 cm length of wire is attached to a support. A load is attached to the free end of the wire, which extends by 2 mm. Which of the following is the
January 2019, AS Unit 1, Q9 (1 mark): The stiffness constant and the Young modulus are terms used in physics. Which row of the table shows the correct application of these terms? Stiffness constant
January 2019, AS Unit 1, Q17(a) (4 marks): As the concrete dries its Young modulus increases. Show that the value for the Young modulus of the concrete after it has dried is at least 1.3 times greater. (
January 2019, AS Unit 1, Q17(b) (3 marks): The energy absorbed before fracture by the 28-day old sample is less than the energy absorbed before fracture by the 2-day old sample. The area under a stress-s
January 2019, AS Unit 1, Q17(c) (3 marks): Manufacturers recommend leaving concrete blocks to dry for at least 28 days before use. Discuss why. (3)

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