a force is applied on a body of mass 20kg moving with a velocity of 40 ms . the body aatains a velocity of 50m/s in 2 secs. calculate the work done on the body.
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w=f•s
a=v-u/t=5
f=m•a = 100N
s in 2 sec is 20m
w= 100•20
= 2000j
a=v-u/t=5
f=m•a = 100N
s in 2 sec is 20m
w= 100•20
= 2000j
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