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IGCSE · 1 · multiple choice

Motion, forces and energy · Question 5

Motion, forces and energy · Original GioPhysics question with a detailed, mark-by-mark answer guide.

Demand
demanding
Marks
1
Topics
1
Answer
Complete
Ball released from rest above the ground and the height it rebounds to1.8 mreleased from restball, mass 0.50 kg1.2 mhighest point after the bounce
Fig. 5.1A ball of mass 0.50 kg is drawn twice above level ground. On the left it is at the point of release, with a dimension line marking 1.8 m from the ground up to the ball. On the right it is at the highest point reached after the bounce, with 1.2 m marked in the same way. Dashed vertical lines show the path down and the path back up.
multiple choice1 mark

A ball of mass 0.50 kg is dropped from a height of 1.8 m and rebounds to a height of 1.2 m. How much energy is transferred away from the ball during the bounce?

  1. A

    0.60 J

  2. B

    2.9 J

  3. C

    5.9 J

  4. D

    8.8 J

Ready to self-mark?Reveal the detailed answer guide
Answer overviewCorrect answer: B — 2.9 J
01

Answer and reasoning

1 mark
How to approach it

Predict from the governing principle before looking for a matching option. Then reject alternatives by checking direction, units, limiting behaviour or the physical meaning of each statement.

  1. 1

    The correct choice is B: 2.9 J

  2. 2

    C and D are mgh for the full drop and for the two heights added together. The question is about the difference in height, 0.60 m, and only B uses it. A is the height itself, not an energy.

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