1.

Consider 3 identical balls, each having mass of 0.1 kg. The ball A has an initial velocity of 10 sqrt( 3) m//s. It then collides simultaneously with balls B and C, whose centres are on a line perpendicular to the initial velocity of the ball A. They are initially in contact with each other and are at rest. The ball A is aimed directly at the contact point of B and C. After the collision, if the ball A comes to rest, then

Answer»

Collision in elastic.
Collision is INELASTIC and FINAL KINETIC energy of the system-INITIAL kinetic energy of the system = 5J
Collision is inelastic and final kinetic energy of the system - Initial kinetic energy of the system = - 5J
Collision in elastic, but the final kinetic energy of the system is less than the initialkinetic energy of the system.

ANSWER :C


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