1.

A string wrapped on a pulley of moment of inertia ' \( I \). Other end of the string is connected to block of mass ' \( m \) ' as shown. If ' \( m \) ' is released from rest then kinetic energy of block when it descends by ' \( h \) ', is(1) mgh(2) Greater than mgh(3) Less than mgh(4) \( \frac{m g h}{2} \)

Answer»
By mass of conservation of energy the sum of potential energy and kinetic energy remains constant..so answer is mgh




Discussion

No Comment Found

Related InterviewSolutions