A motor of input power 160 W raises a mass of 8.0 kg vertically at a constant speed of
PHYSICS · Single correct · CBSE · Physics · Work and Energy · Work and Energy
Problem
A motor of input power 160 W raises a mass of 8.0 kg vertically at a constant speed of 0.50 m s−1.
What is the efficiency of the system?
(A) 0.63%
(B) 25%
(C) 50%
(D) 100%