The velocity of a particle varies with time as

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

The velocity of a

2\,\text{kg}

particle varies with time as

v = 4t\;\text{m/s}

, where

t

is in seconds. Find the instantaneous power developed by the net force acting on the particle at

t = 3\,\text{s}

. (a)

48\,\text{W}

(b)

96\,\text{W}

(c)

144\,\text{W}

(d)

192\,\text{W}