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

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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

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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

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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

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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

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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

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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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