a force acting on a 20 k g mass change it velocity from 5m/s to 2m/s calculator the force
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Answer:
Initial velocity =5(u)
Final velocity =2(v)
From work energy theorem
W=K*E
W=1/2mv2-1/2mu2
W=1/2×20×2(2)-1/2×20×5(5)
W=-210j
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