Q.

Which one of the following motions on a smooth plane surface does not involve force?

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a

Accelerated motion in a straight line

b

Retarded motion in a straight line

c

Motion with constant momentum along a straight line

d

Motion along a straight line with varying velocity

answer is C.

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Detailed Solution

Motion with constant momentum along a straight line. According to Newton’s second law rate of change of momentum is directly proportional to force applied.

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Which one of the following motions on a smooth plane surface does not involve force?