Answer:
(a) Potential Energy It is the energy possessed by a body
by virtue of its position or shape.
(b) In a toy car, the wound spring possesses potential energy.
When spring is released, its potential energy changes into kinetic energy due
to which the toy car moves.
(c) Here, m = 50 kg, =
75 m, =60 m
At point A, = 50 x 10 x 75 = 37500
J
At point B, = 50 x 10 x 60 =30000
J
Change in PE = 37500 - 30000 = 7500 J
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