A lift of mass starts from rest and moves vertically upward with a constant…

PHYSICS · Single correct · CBSE · Physics · Work, Energy and Power · Work, Energy and Power

Problem

A lift of mass

500\,\text{kg}

starts from rest and moves vertically upward with a constant acceleration of

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

. Find the power supplied by the motor

5\,\text{s}

after the start. (Take

g=9.8\,\text{m s}^{-2}

.) (a)

9.4\,\text{kW}

(b)

10.2\,\text{kW}

(c)

5.1\,\text{kW}

(d)

9.8\,\text{kW}