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3.2 Kinematics

3.2 Kinematics

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Question 170

Two objects, P P\,P and QQQ, are dropped from rest from different heights above level ground.

Object P P\,P is released from a height of H H\,H metres.

Object Q Q\,Q is released T T\,T seconds after P P\,P from a height of cH cH\,cH metres, where 0<c<10 < c < 10<c<1.

Both objects hit the ground exactly 4 seconds after P P\,P was released.

Assuming air resistance is negligible, prove that

T=4(1−c) T = 4(1 - \sqrt{c}) T=4(1−c​)

Fully justify your answer.

[5]
Markscheme

3.2 Kinematics Questions

  1. A Level
  2. /Maths
  3. /3.2 Kinematics

260 exam-style questions on OCR A Level Maths 3.2 Kinematics, covering 3.2.1 Language of kinematics, 3.2.2 Graphs in kinematics, 3.2.3 Displacement-time and velocity-time graphs, 3.2.4 Constant acceleration formulae, 3.2.5 Constant acceleration in two dimensions (A-level only), 3.2.6 Non-uniform acceleration in one dimension (A-level only), 3.2.7 Non-uniform acceleration in two dimensions (A-level only), 3.2.8 Motion under gravity using vectors (A-level only), and 3.2.9 Projectiles (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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