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A body of mass 5 kg initially at rest is...

A body of mass 5 kg initially at rest is subjected to a force of 20 N. What is the kinetic energy acquired by the body at the end of 10 s?

Text Solution

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Total weight `= 70 kg + 30 kg = 100kg`
`therefore` Force `= 100 kg xx 9.8 m//s ^(2) = 980 N`
Distance `= 20 m`
`therefore `word `W = F xx s`
`= 980 xx 20 = 19 600 ` joule
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