Physics Test Worksheets With Answer, 2013 Page 3
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1118. A ball is released from height h on the ground level. If the coefficient of restitution is e,
then what height will after 2 times jump from ground?
(a) ch/2
(b) 2ch
(c) eh
(d) e4h
Ans.(d)
20. If the displacement of simple pendulum at any time is 0.02 m and acceleration is 2 m/
s2, then in this time angular velocity will be
(a) 100 rad/s
(b) 10 rad/s
(c)1 rad/s
(d)0.1rad/s
Ans.(b)
21. Which is constant, the earth revolving around the sun?
(a) Angular momentum
(b) Linear momentum
(c) Rotational kinetic energy
(d) Kinetic energy
Ans.(a)
23. Two spheres each of mass M and radius R/2 are connected with a massless rod of length
2R as shown in the figure. What will be the moment of inertia of the system about an axis
passing through the centre of one of the spheres and perpendicular to the rod?
(a)pV
(b)2pV
(c)3pV
(d)4pV
Ans.(a)
24. In non- elastic collision
(a) momentum Is conserved
(b) energy is conserved
(c) momentum and energy are conserved
(d) momentum and energy are non conserved
Ans.(a)
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