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1. |
A ball of mass 250 g moving on a smooth horizontal table with a velocity of 10 m/sec hits an identical stationary ball B on the table. If the impact is perfectly plastic, the velocity of the ball B just after impact would be |
A. | zero |
B. | 5 m/sec |
C. | 10 m/sec |
D. | none of these. |
Answer» B. 5 m/sec | |