A particle moves on a straight line

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

Problem

1\,\text{kg}

particle moves on a straight line. The force acting on it varies with time as

F(t)=4t\,\text{N}

, where

t

is in seconds. The particle starts from rest at

t=0

. What is the average power delivered by the force during the first

4\,\text{s}

? (a)

256\,\text{W}

(b)

128\,\text{W}

(c)

64\,\text{W}

(d)

171\,\text{W}