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  4. A marble going at a speed of 2 ms -1 hits another marble of equal mass at rest. If the collision is perfectly elastic. The velocity of the first after collision is

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Q. A marble going at a speed of $2 \,ms ^{-1}$ hits another marble of equal mass at rest. If the collision is perfectly elastic. The velocity of the first after collision is

Work, Energy and Power

Solution:

$v_{1}=\left(\frac{m_{1}-m_{2}}{m_{1}+m_{2}}\right) u_{1}+\left(\frac{2 m_{2} u_{2}}{m_{1}+m_{2}}\right)$