1. A) Give one example, where a body is in motion, yet it possesses no energy.
b) Is the energy a scalar or a vector quantity?
c) What happens to the potential energy of a body, if its (1) height is doubled, (2) mass is increased by three times, (3) the body is taken of the surface of the Moon?

(A)=If A body is in motion it will posssess ke, this is impossible
(B)=it is scalar
(C)=m=3m
h=2h
g=in earth it is nearly 10m/s then in earth surface it would be 10/6 if abody of mass3kg its mass on moon will be 3/6
so
pe=m x g x h
pe=3m x 10/6 x 2h
pe=10mh

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A. when a body is in uniform motion.
b.scaler
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