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PhysicsW.E.P.PowerEasy2 minPYQ_2020

PhysicsEasysingle choice

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

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Answer:

Solution:

Acceleration $a = \frac{ν_{1}}{t_{1}}$

$∴ Velocity (ν) = 0 + a t = \frac{ν_{1}}{t_{1}} t$

Power $P = Force \times velocity = m a ν$

or $P = m (\frac{ν_{1}}{t_{1}}) \times (\frac{ν_{1} t}{t_{1}}) = \frac{m ν_{1}^{2} t}{t_{1}^{2}}$

Stream:JEESubject:PhysicsTopic:W.E.P.Subtopic:Power

⏱ 2mℹ️ Source: PYQ_2020

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