A force of 10 N acts on a body of mass 2 kg for 3 s, initially at rest . Calculate : (i) the velocity acquired by the body , and (ii) change in momentum of the body.
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force=mass×acceleration
acceleration=force/mass=10/2=5m/sec^2
velocity=integration of acceleration with respect to t from 0sec to 3 sec
velocity=15m/sec
momentum=mv2-mv1
2×15=30kgm/sec
acceleration=force/mass=10/2=5m/sec^2
velocity=integration of acceleration with respect to t from 0sec to 3 sec
velocity=15m/sec
momentum=mv2-mv1
2×15=30kgm/sec
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