127. The velocity of a mass of 5 kg after falling a height of 5 m from rest would be approximately equal to

A.5 m/sec

B.10 m/sec

C.25 m/sec

D.50 m/sec

128. A body whose true weight is 14 gm appeared to weigh 13 gm when weighed by means of a spring balance in a moving lift. What was the acceleration of lift at that time

A.1 m/sec^2

B.0.7 m/sec^2

C.0.5 m/sec^2

D.0.4 m/sec^2

129. A ball is thrown up. The sum of kinetic and potential energies will be maximum at

A.Ground

B.Highest point

C.In the centre while going up

D.At all the points

130. Energy is defined as

A.Rate of doing work

B.Capacity of doing work

C.Power of doing work

D.All of the above

131. Moment of inertia of a body does not depend upon

A.Angular velocity of body

B.Mass of the body

C.Distribution of mass in the body

D.Axis of rotation of the body

132. Power is defined as

A.Rate of doing work

B.Capacity nf doing work

C.Power of doing work

D.All of the above

133. A jet engine works on the principle of conservation of

A.Energy

B.Mass

C.Angular momentum

D.Linear momentum

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