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Q: Why a rock or a ball on a hill have energy?
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When a ball stops moving does it lose its energy?

It loses it's kinetic energy, the energy of motion. If it were logded against a rock on a hill, it has potential energy stored because of it's position on the hill.


Why is a rock on the top of a hill kinetic energy?

A rock on top of a hill has potential energy, not kinetic energy. If it starts rolling down the hill then the potential energy transforms to kinetic energy.


What form of energy is stored in a rock before its fall from a hill?

Potential energy is the energy stored in a rock before its fall from a hill.


What energy is a rock on top of a hill?

Gravitational potential energy is the type of energy stored in an object if it is raised in a gravitational field. A rock on top of a hill is a good example of this as it has a higher potential energy than a rock at the bottom of a hill.


What is the energy of position- such as a rock on a hill?

Gravitational Energy(:


The energy of position such as a rock on a hill is?

Potential energy


What energy is possessed by the ball on a hill?

Gravitational potential energy.


What type of energy is a rock resting on hill?

Potential Energy


Is rolling a ball up a hill exothermic?

No, a ball sitting at the top of a hill has potential energy, but once that ball starts to roll down the hill it's potential energy is converted to kinetic energy, the energy of motion. I disagree 100% with this edit. If a ball is rolling down hill and is say half way down it still has potential energy ready to be converted to kinetic energy So the answer is YES


Does a rock have potential energy on a hill?

yes


What happens to the potential energy and the energy of a ball as it rolls down a hill from a position of rest at the top of the hill?

The potential energy gets less until the ball gets to the bottom of the hill, at which point the potential energy is zero. The potential energy that is lost, gets converted to Kinetic energy of the ball that goes faster and faster as it gets more and more of the Potential energy.


How is a ball on a hill gravitational energy?

the object has a potential energy relative to , for example, the bottom of the hill, or the bottom of the slide.