Question

At certain height a freely falling body a kinetic energy equal to 1o joule and potential energy equal to 10 joule if after falling by some height the kineti energy found 16 joule what Wii be the potential energy

Answer 1

given PE= 10 joule
KE=10joule
& TE=PE+KE=20joule

after falling by some ht;

TE=20joule[since totalenergy of a freely falling body remains constant]
& KE=16 joule

we know that PE+KE=TE

PE=20-16


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;;PE=4 joule

Answer 2

The potential energy at that point will be 4 joules

Explanation:

It is given that at a certain height, a freely falling body a kinetic energy equal to 10 joule and potential energy equal to 10 joule. The total energy of the system at this point is,

T = 10 + 10 = 20 J

Now at another height, the kinetic energy is found to be 16 joule, we need to find the potential energy at that point.

It is case of conservation of mechanical energy which states that the total energy of the system remains constant.

So, PE = TE - KE

PE = 20 - 16

PE = 4 Joules

So, the potential energy at that point will be 4 joules. Hence, this is the required solution.

Learn more,

Conservation of energy

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