Quelpr
5 marksEffects of Forces

CAPE Physics Unit 1 · 2013 · Paper 2 · Question 4(a)

State fully what is meant by the expression 'the Principle of Moments'. With the aid of an appropriate diagram, use the Principle of Moments to explain how it is possible for a person of mass 50 kg to lift someone twice as heavy on a see-saw.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 4(b)(i)State the law of conservation of momentum.[1 mark]
  2. 4(b)(ii)a)Assuming that the Law of Conservation of Momentum applies for this collision: Calculate the ratio of the masses of the two objects, m₁:m₂.[10 marks]
  3. 4(b)(ii)b)Calculate the total kinetic energy of the two objects before the collision, given that m₁ = 8.5 kg.[1 mark]
  4. 4(b)(ii)c)Was this an elastic collision? Explain why or why not.[1 mark]

More practice: the rest of this paper · more Effects of Forces questions · all CAPE Physics Unit 1 past papers