A girl is holding a rubber ball outside the window of a tall building. The ball has a mass of 0.20 kg and is resting 10 m above a concrete path.
(a)[2]
Calculate the gravitational potential energy of the ball with respect to the concrete path.
(b(i))[2]
Calculate the kinetic energy of the ball just after it strikes the concrete path.
(b(ii))[3]
Show that the ball's change in momentum as it bounces from the path is 5.2 kg m/s.
(b(iii))[2]
Calculate the average resultant force on the ball during the 0.25 s it is touching the path.
Worked solution & mark scheme
This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: “ΔEp = mgΔh or 0.2 \times 9.8 \times 10” …
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