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4 marksDynamics: Motion in a Straight Line

CSEC Physics · 1996 · Paper 2 · Question 2(b)(ii)

The apparatus shown in Figure 3 is used to determine the acceleration due to gravity of a small iron ball. Height of fall, h, and time of fall, t, are measured.

Using this apparatus, a student obtains a value of 0.490 s for t, when h is 1.16 m. Calculate the average speed of the ball during the fall. Hence, calculate the final speed of the ball just before its impact with the trap door.

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Other parts of this question

  1. 2(a)(i)Define the term acceleration.[1 mark]
  2. 2(a)(ii)Explain why the object accelerates.[1 mark]
  3. 2(a)(iii)Why is the acceleration of free fall the same for all objects at the same place, if air resistance is negligible?[2 marks]
  4. 2(b)(i)Explain how the apparatus works.[3 marks]
  5. 2(b)(iii)Sketch the velocity-time graph for the motion of the ball on the axes provided. Using the graph, or otherwise, calculate the acceleration of the ball during…[4 marks]

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