PhysicsNEET 2024Power and vertical circular motion

Work, Energy and Power

At any instant of time $t$ , the displacement of a particle is given by $2 t - 1$ (SI units) under the influence of a force of 5 N. The value of the instantaneous power is (in SI units):

A.5
B.7
C.6
D.10✓

Solution

Velocity $v = \frac{d x}{d t} = 2$ m/s (constant). Instantaneous power $P = F v = 5 \times 2 = 10$ W.

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