A ball of mass 0.5kg moving at 10ms−1 collides wit...
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.
0.2ms−1
0.5ms−1
5.0ms−1
5.5ms−1
Correct answer is C
Using; m1 u1 + m2 u2 = (m1 + m2)v
m1 = 0.5kg, u1 = 10ms1, m2 = 0.5kg, u1 = 0
∴ (0.5kg x 10) + (0.5 x 0) = (0.5 + 0.5)v
v = 5ms^{1}
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