The weight is twice as much as the external force applied to a body that weighs 40kg.
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Answer:
Given,
Mass=40kg,v=1m/s,v=2m/s
According to the work-energy conversion theorem;
Work done by the force= Change in Kinetic energy,
Work done by the force =( 21 )×m×(v
2 −u 2 )
Work done =0.5×40×(4−1)=60J
Explanation:
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