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(A) Given: Mass = $m$,Initial velocity $u = 0$,Final velocity at time $T$ is $v$.Since the body is accelerated,the acceleration $a$ is constant: $a =

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$mv^2/T^2 \cdot t$

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(A) Given: Mass = $m$,Initial velocity $u = 0$,Final velocity at time $T$ is $v$.Since the body is accelerated,the acceleration $a$ is constant: $a = \frac{v - u}{T} = \frac{v}{T}$.The velocity at any time $t$ is given by $v(t) = u + at = 0 + (\frac{v}{T})t = \frac{v}{T}t$.The force acting on the body is $F = ma = m(\frac{v}{T})$.The instantaneous power $P$ is given by $P = F \cdot v(t)$.Substituting the values: $P = (m \cdot \frac{v}{T}) \cdot (\frac{v}{T}t) = \frac{mv^2}{T^2}t$.

$A$ body of mass $m$ starts from rest and is accelerated to a velocity $v$ in time $T$. The instantaneous power delivered to the body as a function of time $t$ is:

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