A ball of mass m moving at velocity u collides with another ball of equal mass at rest. If the two balls move off together after the impact, calculate their common velocity.
\(M_1\) = \(M_2\) = M, \(U_1\) = U and \(U_2\) = 0
\(M_1U_1\) + \(M_2U_2\) = V\((M_1 + M_2\))
M x U + M x 0 = V(M+M)= 2MV
MU = 2MV
V = \(\frac{U}{2}\)
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