Turning Forces · CSEC Physics

28 past-paper questions on Turning Forces, part of Mechanics, from every CSEC Physics paper on Quelpr.

1. 2(a)(i)3 marks· CSEC Physics · 2021 · Paper 2Define the term moment of a force.
2. 2(a)(ii)2 marks· CSEC Physics · 2021 · Paper 2Define the term centre of gravity.
3. 2(b)2 marks· CSEC Physics · 2021 · Paper 2State the TWO conditions necessary for a body to be in equilibrium.
4. 2(c)(i)2 marks· CSEC Physics · 2021 · Paper 2Calculate the tension in Spring Q. Show ALL working.
5. 2(c)(ii)5 marks· CSEC Physics · 2021 · Paper 2By taking moments about A, determine the horizontal distance from P to C.
6. 2(c)(iii)1 mark· CSEC Physics · 2021 · Paper 2State why the centre of gravity is located closer to the point P than the point Q.
7. 1(d)1 mark· Physics Q1 1(d)Use your graph to determine how far the 50 g mass needs to be placed if it balances when the plasticine was placed 27.5 cm from the pivot, R.
8. 1(e)4 marks· Physics Q1 1(e)State the Principle of Moments.
9. 1(f)(i)4 marks· Physics Q1 1(f)(i)The weight of the plasticine, Wp, is related to the weight of the 50 g mass, Wm, by the formula, Wp = gradient × Wm. Determine the weight of the plasticine, Wp.
10. 2(b)(i)1 mark· Physics Q2 2(b)(i)Label, as W, the point on Figure 2 where the weight of the plank acts.
11. 2(b)(ii)4 marks· Physics Q2 2(b)(ii)Calculate the weight of the plank, W.
12. 2(b)(iii)3 marks· Physics Q2 2(b)(iii)If Patrick sat alone on the plank, calculate where he would have to sit in order to maintain his 'magical' balancing act. The pivot remains as before.
13. 3(a)(i)4 marks· Physics Q3 3(a)(i)Fill in the blanks in the following passage about the moments of forces. The _______________ of moments states that when a body is in equilibrium the sum of the _______________ about any _______________ is equal to the…
14. 3(a)(ii)2 marks· Physics Q3 3(a)(ii)Apart from the 'seesaw', identify TWO situations in which a force will result in a turning effect.
15. 3(b)(i)4 marks· Physics Q3 3(b)(i)By taking moments about the pivot, calculate the distance, x, that Keion must sit from the pivot to balance the plank if Kyle sits 1 m from one end of the plank.
16. 3(b)(iii)1 mark· Physics Q3 3(b)(iii)What is the moment of the reaction force about the pivot?
17. 3(c)(i)2 marks· Physics Q3 3(c)(i)Many forces act on the yacht yet it is in equilibrium. State TWO conditions that must be satisfied for an object to be in equilibrium.
18. 3(c)(ii)1 mark· Physics Q3 3(c)(ii)State the effect that the position of the centre of gravity of an object has on its stability.
19. 4(a)3 marks· Physics Q4 4(a)Define 'the moment of a force'.
20. 4(a)(i)6 marks· Physics Q4 4(a)(i)Define the 'moment of a force'.
21. 4(a)(ii)6 marks· Physics Q4 4(a)(ii)Draw a diagram to illustrate the action of a force multiplier lever.
22. 4(a)(iii)6 marks· Physics Q4 4(a)(iii)Explain the operation of a force multiplier lever.
23. 4(b)3 marks· Physics Q4 4(b)State the principle of moments.
24. 4(b)(i)9 marks· Physics Q4 4(b)(i)Identify the nature and point of action of the third force acting on the wheelbarrow. Write down an equation showing the relationship between the THREE forces.
25. 4(b)(ii)b)9 marks· Physics Q4 4(b)(ii)b)Calculate the value of the applied force, F (see Figure 3). [acceleration due to gravity, g = 10 ms⁻²]
26. 4(c)(i)3 marks· Physics Q4 4(c)(i)Indicate by drawing arrows on Figure 4 the forces acting on the bicycle.
27. 4(c)(ii)3 marks· Physics Q4 4(c)(ii)Write TWO equations relating these forces.
28. 4(c)(iii)3 marks· Physics Q4 4(c)(iii)The bicycle has a mass of 20 kg. Use the result you obtained in Part (c) (ii) to determine the tension in the string. [Acceleration due to gravity, g = 10 m s⁻²]