Question

A body of mass 500g initially of rast is subject to a force of 20N force 1sec calculate change in moment of the body during the second

Answer 1

Explanation:

momentum=mass × velocity. ....(1)

mass=500/1000= 1/2kg

initial m= 1/2×0=0. (initially at rest so v=0). ...(2)

now

acceleration=force/t=20/1=20m/s^2

from law of motion

v=u+at

v=0+20×1

v=20m/s

continuing 2

final m=1/2×20=10

change in momentum=final-initial

=10-0=10kgm/s

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