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# Physics homework help?

A catapult fires a stone of mass 0.04 vertically upwards.

If the stone has an initial kinetic energy of 48J, how high will it travel before it starts to fall back to the ground?

I don't want the answer i just want to know how to work it out.

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- 9 years agoFavorite Answer
Required height H is given by

0.04*9.81*H = 48 or H = 12.02 or 12 m

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