plumiMoments and centre of gravity: Edexcel A‑Level Physics questions
Every Edexcel A-Level Physics exam question on Moments and centre of gravity (specification points 23–24), 2016–2025, with its mark scheme and examiner’s report.
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Calculations
Q12(a)
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Q12(b)
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Q12(c)
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Q3(a)(i)
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Q3(a)(ii)
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Q3(b)
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Q12(a)
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Q12(b)
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Q11(a)
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Q11(b)
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Q16(b)(ii)
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Q14(a)(i)
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Q13(a)(ii)
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Q13(b)
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Q11(a)
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Q11(b)
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All 30 questions on Moments and centre of gravity, as a list
- June 2025, Paper 1, Q12(a) (2 marks): State the two conditions needed for the arrangement to be in equilibrium. (2)
- June 2025, Paper 1, Q12(b) (4 marks): Determine the weight of the counterweight. Assume the mass of the lever-arm is negligible. mass of pan = 260 g (4) Weight of counterweight =
- June 2025, Paper 1, Q12(c) (2 marks): An object is placed in the pan. The lever-arm moves along the scale. Explain why the lever-arm pointer moves through a large distance whilst the pan moves a muc
- June 2025, Paper 3, Q3(a)(i) (2 marks): The metre rule is in equilibrium. Explain why the increase in mass recorded by the balance is not equal to the mass of the metre rule. (2)
- June 2025, Paper 3, Q3(a)(ii) (4 marks): Calculate the weight of the metre rule. You should take moments about the pivot. (4) Weight of metre rule =
- June 2025, Paper 3, Q3(b) (3 marks): The student wants to reduce the percentage uncertainty in the value obtained for the weight of the metre rule. The student repeated her determination of the wei
- June 2025, AS Paper 1, Q12(a) (5 marks): The length of the bookcase is 1.50 m. The centre of gravity C of the bookcase is 0.55 m from one end. The people exert forces FA and FB on the bookcase at point
- June 2025, AS Paper 1, Q12(b) (5 marks): The two people now support the bookcase so that it is tilted with point A higher than point B, as shown. The bookcase is stationary and the forces exerted at po
- June 2024, Paper 1, Q11(a) (1 mark): State what is meant by the moment of a force about a point. (1)
- June 2024, Paper 1, Q11(b) (4 marks): The bus is balanced on a pivot that is a distance y from the centre of the bus. The centre of mass of the gold is 1.5 m from one end of the bus. The centre of m
- June 2024, AS Paper 1, Q9 (3 marks): A windsurfer stands on a windsurf board and holds onto the sail, as shown. sail windsurfer windsurf board As the force from the wind increases, the windsurfer l
- June 2024, AS Paper 1, Q16(b)(ii) (4 marks): The student was given the following relationship Wd l C kD where C is a constant D is the distance from the pivot to the spring = 0.875 m W is the weight on the
- June 2023, Paper 1, Q14(a)(i) (4 marks): Determine, by taking moments, the force exerted on rod X by rod Y. (4) Force =
- June 2023, AS Paper 1, Q13(a)(ii) (3 marks): Determine the force exerted by the wall on the plank. (3) Force exerted by wall on plank =
- June 2023, AS Paper 1, Q13(b) (3 marks): A student of weight 550 N states that the plank will tip if she walks from the rock to the other end of the plank. Justify the student’s statement. (3)
- June 2022, AS Paper 1, Q16 (5 marks): A student investigated how the supporting forces on a bridge vary as traffic moves across the bridge. The student made a simple model of a bridge using a metre
- November 2021, Paper 1, Q6 (1 mark): A trapdoor is fixed to a vertical wall with a hinge. A wire is attached to the other end of the trapdoor and inclined at an angle of 60°, as shown. The wire hol
- November 2021, AS Paper 1, Q9 (2 marks): A uniform rigid rod AB of length 1.50 m has a weight W of 6.5 N. A force of 3.5 N applied at A balances the rod on a pivot as shown. Diagram not to scale A B pi
- October 2020, Paper 1, Q11(a) (1 mark): State what is meant by the centre of gravity of an extended body. . (1)
- October 2020, Paper 1, Q11(b) (4 marks): The paving slab has a weight of 310 N and a length of 90 cm and will be supported at two points, P and Q, as shown. The distance between P and Q will be 75 cm.
- October 2020, AS Paper 1, Q10(a) (2 marks): State what is meant by ‘in equilibrium’. (2)
- October 2020, AS Paper 1, Q10(b)(i) (1 mark): The owl has a mass 2M and the crow has a mass M. Show that the perch will balance when suspended as shown from position X. (1)
- October 2020, AS Paper 1, Q10(b)(ii) (3 marks): The perch is then attached to a second perch and suspended as shown. Two more birds, not shown, are placed at A and B, and the whole arrangement is in equilibri
- June 2019, AS Paper 1, Q13(a)(ii) (6 marks): The diagram shows the lines of action of the forces acting on the hiker and backpack. Position O represents the middle of the back foot of the hiker. 0.40 m F 0
- June 2019, AS Paper 1, Q13(b) (2 marks): The hiker repacks his bag, placing the heavier items at the bottom of the bag. Explain why this may cause R on the front foot to decrease. (2)
- June 2018, Paper 1, Q13(a) (4 marks): The beam has a constant thickness and a mass of 3.05× 104 kg. The length of the beam is 11.0 m. The pivot P is positioned 6.0 m from the steam cylinder end of t
- June 2018, AS Paper 1, Q10(b) (3 marks): It was observed that if the wire was not hung with its midpoint over the nail, as in Diagram 1, the picture moved and then remained in the position shown in Dia
- June 2017, AS Paper 1, Q13(a) (3 marks): Determine the distance of the centre of gravity of the loaded trolley from the wheels. (3) Distance =
- June 2016, AS Paper 1, Q11(b) (5 marks): Due to the large area of the backboard, the basketball set may topple over when the wind blows. backboard force of the wind Fw 0.40m weight of post arrangement
- June 2016, AS Paper 1, Q11(c) (3 marks): The base is filled with sand instead of water. The density of sand is greater than the density of water. State and justify what would happen to the value of Fw
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