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,     from Physics Work, Energy and Power Class 11 Manipur Board

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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,
• (i) t1/2

• (ii) t

• (iii) t 3/2

• (iv) t2

B.

(ii) t

Tips: -

From,

v = u + at

v = 0 + at = at

As power, P = F × v

∴            P = (ma× at = ma2t

As m and a are constants, therefore, P ∝ t
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