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two balls are thrown upward and reach height h. The first ball reaches the ground level...

two balls are thrown upward and reach height h. The first ball reaches the ground level at a speed of 5 m/s and the second ball at 5.5 m/s. The speed of the first ball at height h is 2 m/s.

Find the speed of the second ball at height h by using the principle of conservation of energy

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