A trolley travels in a straight line with a constant speed of

PHYSICS · Multi-part · CBSE · Physics · Work, Energy and Power · Work, Energy and Power

Problem

2\,\text{m\,s}^{-1}

. A horizontal force along the direction of motion varies with time according to

F(t)=10t^{2}\;\text{N}

, where

t

is in seconds. The force acts from

t=0

t=3\,\text{s}

. (i) Compute the work done by the force during this interval. (ii) Find the average power developed by the force over the same interval.