# Engineering Mechanics

## When the spring of a watch is wound, it will possess

A.strain energy B.kinetic energy C.heat energy D.electrical energy

## If two bodies having masses m1 and m2 (m1 > m2) have equal kinetic energies, the momentum of body having mass m1 is

A.equal to B.less than C.greater than undefined

## When a body of mass moment of inertia / (about a given axis) is rotated about that axis with an angular velocity ?, then the kinetic energy of rotation is

A.I ? B.I ?2 C.0.5 I ? D.0.5 I ?2

## The wheels of a moving car possess

A.potential energy only B.kinetic energy of translation only C.kinetic energy of rotation only D.kinetic energy of translation and rotation both

## According to principle of conservation of energy, the total momentum of a system of masses in any direction remains constant unless acted upon by an external force in that direction.

A.True B.False undefined undefined

## The total energy possessed by a system of moving bodies

A.is constant at every instant B.varies from point to point C.is maximum in the start and minimum at the end D.is minimum in the start and maximum at the end

## The potential energy of a vertically raised body is

A.equal to B.less than C.greater than undefined

## Joule is the unit of

A.force B.work C.power D.energy

## The rate of doing work is known as

A.potential energy B.kinetic energy C.power D.none of these

## The unit of power in S.I. units is

A.horsepower B.joule C.watt D.kg-m