A trolley of mass starts from rest on a frictionless track

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

Problem

A trolley of mass

500\,\text{kg}

starts from rest on a frictionless track. Its motor provides a constant power of

20\,\text{kW}

. What is its speed after

10\,\text{s}

? (a)

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

(b)

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

(c)

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

(d)

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