A quarter horse power motor runs at a speed of 600 r.p.m. Assuming 50% efficiency, the work done by

An elevator has a fully loaded mass of 1200 kg. It moves upward at a constant speed of 2.5 m s−1. If

A particle of mass m is driven by a machine that delivers a constant power k watt. If the particle s

A car is moving at a speed of 40 km/hr. If the car engine generates constant 7 kilowatt power, then

A car of mass m starts from rest and accelerates so that instantaneous power delivered to the car ha

An engine pumps water through a hose pipe. Water passes through the pipe and leaves it with a veloci