Two stone P and Q of different masses m and 2m respectively are dropped simultaneously from the top of a tower and reach the ground with different energies.Which one is faster?

Image Solution of Question: 

Two stone P and Q of different masses m and 2m respectively are dropped simultaneously from the top of a tower and reach the ground with different energies.Which one is faster?

Question: Two stone P and Q of different masses m and 2m respectively are dropped simultaneously from the top of a tower and reach the ground with different energies.Which one is faster?

Answer: 

Both the sone P and Q will but the ground at same time because the time of flight is √2h/g and doesn't depend upon mass.

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