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Practice Energy transformations (Ouestion 5 of 10)
Q5
A penny is dropped from the top of the Statue of Liberty. The Statue of Liberty is 93 m tall If a penny has about 3 Joules of gravitational potential energy at the top, how much
potential energy will have transformed into kinetic energy at the half way point (46.5m) ?

Answer 1

Step-by-step 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=(P)/(gh)\\\\m=(3)/(9.8* 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* 9.8* 46.5\\\\E=1.499\ J`

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