If a rubber ball falls from a height and rebounds up to the height of . The percentage loss of total energy of the initial system as well as velocity ball before it strikes the ground, respectively, are [2024]
(C) Velocity just before collision =
Velocity just after collision =
% loss in energy
A spherical body of mass 100 g is dropped from a height of 10 m from the ground. After hitting the ground, the body rebounds to a height of 5 m. The impulse of force imparted by the ground to the body is given by (given ) [2024]
4.32 kg
43.2 kg
23.9 kg
2.39 kg
(4)
Impulse
A simple pendulum of length 1 m has a wooden bob of mass 1 kg. It is struck by a bullet of mass kg moving with a speed of . The bullet gets embedded into the bob. The height to which the bob rises before swinging back is (use ) [2024]
0.30 m
0.20 m
0.35 m
0.40 m
(2)