Answer:
(i) (a)
Mass, m=2.0 kg, height, h = 4.8m Change in gravitational potential energy
= mgh
=2 x 10 x4.8 = 96J
(b) Potential energy Kinetic
energy Heat and/or sound energy
(ii) Weight, mg = 520 N, height, h == 3.0 m. Time, t = 5.0
s
Useful power
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