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Answer 1

Explanation:

At a height of 93 m, the gravitational potential energy is given by :

P = mgh

Where, m is the mass of a penny

We can find its mass.

$m=\dfrac{P}{gh}\\\\m=\dfrac{3}{9.8\times 93}\\\\m=0.00329\ kg$

We need to find how much potential energy will have transformed into kinetic energy at the half way point (46.5m). It can be calculated as :

$E=mgh'\\\\E=0.00329\times 9.8\times 46.5\\\\E=1.499\ J$

Hence, a penny will have transferred 1.499 J of potential energy into kinetic energy.