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Question

What happens to the gravitational potential energy when water at the top of a watefall falls to the pool below?

Answer 1

Conversion

As the water falls its potential energy becomes smaller relative to the surface of the pool and at the same time the kinetic energy increases by the amount of diminishing potential energy.

Ep=mgh
Ek=0.5 mv^2
m – mass of the water
g – gravitational acceleration
h – height of water above the surface of the pool
v – velocity of water
The equation of conservation of energy as a function of time is shown below.

Ep(t1) + Ek(t1) = Ep(t2) + Ek(t2)

(Note that the sum of energies (kinetic and potential) is the same at a instant of time.)

Answer 2

Potential energy of m kg of water at top of h metre high waterfall
= mhg N
Before touching the bottom surface, the energy is converted into kinetic energy = 1/2 m v^2 where v^2 = 2gh
After touching the bottom surface, it is converted into heat and kinetic energy mixed.

Answer 3

It becomes kinetic(motion) energy and is no longer potential. Potential, as in energy, means possible or stored energy. Once it's released , depending on the form it takes, it becomes different kinds of energy IE: kinetic, thermal etc.

Answer 4

Potential energy turns into kinetic energy.

Answer 5

GPE decreases and changes to kinetic energy

Answer 6

potential into kinetic,kinetic into heat and sound energy