Home Physics System of Particles Rotational Motion Centre of Mass A steel ball of radius 2cm is initially at r…
Physics System of Particles Rotational Motion Centre of Mass MCQ (Single Correct)

A steel ball of radius 2cm is initially at rest on a horizontal frictionless surface. It is struck head on by another steel ball of 4 cm radius travelling with a velocity of 81 cm/s. The velocities of two balls after collision are-

A
72 cm/s and 56 cm/s
B
144 cm/s and 56 cm/s
C
144 cm/s and 63 cm/s
D
63 cm/s and 72 cm/s

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The correct answer is:
C

c

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