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For how long should a force of 100 newton act on a body of 20kg so that it acquirs a velocity of 100m/sec

i want proper answer with explanation


As there constant force
there constant acceleration a=F/m=100/20=5 ms-2
Assume that object is initially at rest
intial velocity u=0
final velocity v=100 m/s
t=100/5=20 s
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