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Physics (AS & A Level) · May / June 2020 · Paper 11 · Question 7

9702Equations of motion

A projectile is fired from point P with velocity V at an angle θ to the horizontal. It lands at point Q, a horizontal distance R from P, after time T. [diagram: projectile path from P to Q with velocity V at angle θ, horizontal distance R] The acceleration of free fall is g. Air resistance is negligible. Which equation is correct?

  1. AR = VT cos θ
  2. BR = VT sin θ
  3. CR = VT cos θ − 1/2 gT^2
  4. DR = VT sin θ − 1/2 gT^2

As printed in the paper

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Correct answer: A. R = VT cos θ

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