A block of mass `m` at rest is acted upon by a force `F` for a time t. The kinetic energy of block after time t isA. `(F^(2)t^(2))/(m)`B. `(F^(2)t^(2))/(2m)`C. `(F^(2)t^(2)/(3m)`D. `(Ft)/(2m)`

A block of mass `m` at rest is acted upon by a force `F` for a time t.

1.	A block of mass `m` at rest is acted upon by a force `F` for a time t. The kinetic energy of block after time t isA. `(F^(2)t^(2))/(m)`B. `(F^(2)t^(2))/(2m)`C. `(F^(2)t^(2)/(3m)`D. `(Ft)/(2m)`
Answer» Correct Answer - B Kinetic energy `E = p^(2)/(2m) = (Ft)^(2)/(2m) = (F^(2)t^(2))/(2m)`

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A block of mass `m` at rest is acted upon by a force `F` for a time t. The kinetic energy of block after time t isA. `(F^(2)t^(2))/(m)`B. `(F^(2)t^(2))/(2m)`C. `(F^(2)t^(2)/(3m)`D. `(Ft)/(2m)`

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