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(B) Let the body start from rest $(u = 0)$ and move with a constant acceleration $a$. At any time $t$,the velocity $v$ of the body is given by the fir

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$t$

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(B) Let the body start from rest $(u = 0)$ and move with a constant acceleration $a$. At any time $t$,the velocity $v$ of the body is given by the first equation of motion: $v = u + at = 0 + at = at$. The force $F$ acting on the body is given by Newton's second law: $F = ma$. Power $P$ delivered to the body is defined as the product of force and velocity: $P = F \cdot v$. Substituting the expressions for $F$ and $v$: $P = (ma) \cdot (at) = ma^2t$. Since mass $m$ and acceleration $a$ are constants,the term $ma^2$ is constant. Therefore,$P \propto t$.

$A$ body is initially at rest. It undergoes one-dimensional motion with constant acceleration. The power delivered to it at time $t$ is proportional to

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