A bob of mass $m$ accelerates uniformly from rest to $v_{1}$ in time $t_{1}$. As a function of $t$, the instantaneous power delivered to the body is [image:6_image2.jpeg]

Question

Dr. Abubacker · Accepted Answer

(d) From $v = u + at,v_{1} = 0 + at_{1}\ \ \ \left( \because a = \frac{v_{1}}{t_{1}} ight)$
$F = ma = mv_{1}/t_{1}$
Velocity acquired in $t$ sec $= at = \frac{v_{1}}{t_{1}}t$
Power $= F 	imes v = \frac{mv_{1}}{t_{1}} 	imes \frac{v_{1}t}{t_{1}} = \frac{mv_{1}^{2}t}{t_{1}^{2}}$

Q. A bob of mass $m$ accelerates uniformly from rest to $v_{1}$ in time $t_{1}$. As a function of $t$, the instantaneous power delivered to the body is

Explanation

Reviewed by Dr. Abubacker

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