Physics Test Worksheets With Answer, 2013 Page 9
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11twice the radius
(a) S will run faster than P
(b) P will run faster than S
(c) They will both run at the same rate as on the earth
(d)noneof the adove
Ans.(b)
73. A body is rolling without slipping on a horizontal surface and its rotational kinetic
energy is equal to the translational kinetic energy. The body is
(a) disc
(b) sphere
(c) cylinder
(d) ring
Ans.(d)
74. An inelastic ball is dropped from a height of 100 m. Due to collision with earth, 20% of
its energy is lost. To what height the ball will rise?
(a)80m
(b)40m
(c)60m
(d)20m
Ans.(a)
75. If two soap bubbles of equal radii R coalesce then the radius of curvature of interface
between two bubbles will be
(a) infinity
(b) R
(c)R/2
(d)zero
Ans.(a)
78. An astronaut orbiting the earth in a circular orbit 120 km above the surface of earth ,
gently drops a pen out of space ship. The pen will
(a) move towards the moon
(b) fall vertically down to the earth
(c) move along with space-ship
(d) move opposite direction of space-ship
Ans.(c)
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