EASY
AP EAPCET
IMPORTANT
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The centre of mass of a ring is ___.

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Important Questions on Centre of Mass

HARD
AP EAPCET
IMPORTANT

A ball falls freely from a height 180 m onto the ground and rebounds a number of times. The coefficient of restitution is 0.5 and g=10 m s-2. Then match the quantities given in List - I with their corresponding values in SI units given in List-II

  List-I   List-II
(A) The height it reaches after the first impact  (I) 180
(B) The total distance travelled by it before it comes to rest (II) 6
(C) The time taken to reach the ground first time  (III) 45
(D) The vertical displacement before it comes to rest (IV) 300

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