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Q. |
A ball A of mass 0.25 kg moving on a smooth horizontal table with a velocity of 10 m/s strikes an identical stationary ball B on the table. If the impact is perfectly elastic, the velocity of the ball B just after the impact will be |
A. | 2.5 m/s |
B. | zero |
C. | 5 m/s |
D. | 10 m/s |
E. | 107 dynes |
Answer» C. 5 m/s |
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