A ball of mass 0.5kg moving at 10ms−¹ collides with another ball of equal mass at rest. If the two balls move off together after the impact, calculate their common velocity.

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A. 0.2ms−¹
B. 0.5ms−¹
C. 5.0ms−¹
D. 10.0ms−¹
E. 20.0ms−¹

Correct Answer:

Option C – 5.0ms−¹

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