Question

Newton's first law of m
otion
when the body is in motion or rest ,it remains in motion or rest until and unless when exserted force is not applied by body
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Answer 1

“Every body continues to be in its state of rest or of uniform motion in a straight line unless compelled by an unbalanced external force.” ... The intrinsic property of material body which resists a change in its state of rest or of uniform motion along a straight line is called inertia .