Question

Q. A force of 20N acts on a body of 2kg for 3 seconds .find the kinetic energy in 3 seconds.
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Answer 1

Answer:

Force = Mass *acceleration

F=10N

M=2kg

then,

A=f/m. =10/2 =5ms square

1. Now

U =0

T= 3second

V=U+a+=0+3*5=15m/s

Intinial momentum = mv =2*5= 30 lg-m/s

Change in momentum=Final

Momentum =Intial momentum

=30-0=30kg-m/s.

I hope it is helpul

Answer 2

Explanation:

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