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  4. Two balls of masses m each are moving at right angle to each other with velocities 6 m / s and 8 m / s respectively. If collision between them is perfectly inelastic, the velocity of combined mass is

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Q. Two balls of masses $m$ each are moving at right angle to each other with velocities $6\, m / s$ and $8\, m / s$ respectively. If collision between them is perfectly inelastic, the velocity of combined mass is

Work, Energy and Power

Solution:

Using momentum conservation
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$m \sqrt{6^{2}+8^{2}}=2\, m v^{1}$
$v^{1}=5\, m / s$