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I have a test on Friday and I need to get this question clearly awnsered. What is the difference between force and energy. My teacher said Energy- Ability to do work ; Force- Push or pull on an object. What is the difference. And also I'd appreciate a better explanation of Energy.

2007-12-04 13:11:58 · 2 answers · asked by Mustafa H 1 in Science & Mathematics Physics

I need to have the definitions. Not what comes first. Help me out here plzzzz :)

2007-12-04 13:23:43 · update #1

Can u plz not make it complicated, Im a 7th grade student!!!!!!!!!!

2007-12-04 15:07:06 · update #2

2 answers

Force is an influence on an object with mass that results in a change in velocity. Units are (for example) newtons or lbf.

Work can be thought of as a measure of force acting over a distance, so if you increase either the force or the distance that it is applied, then the work increases. Units are newton - meters = joules or inch - lbf. Energy is a measure of the amount of work that an object is capable of doing. It is evaluated using the same units as work - in a sense, the two are equivalent.

Energy is generally considered as either kinetic, potential, or heat energy.

ADDED (and edited):

I will try, Mustafa.

Anything you do to an object to make it start to move or stop moving is called a force. You can push it, or you can blow on it, or you can hit it with a hammer.

Energy is what you do to that object to make it move for a certain distance.

For example, if I push on an object with 10 lbf it might slide an inch or so. I will be pushing with a force against the object, but using very little energy. If I push on it with 10 lbf and make it move for 50 feet (keep pushing), then I am using more energy to apply the SAME force for that distance. That energy can come from the food going to my muscles, or the gasoline burned in a car, or by a weight that swings down from a great height on a pendulum. Does this help?

2007-12-04 13:47:45 · answer #1 · answered by Larry454 7 · 4 0

Force comes from energy. Without energy you can not have force!

2007-12-04 21:15:35 · answer #2 · answered by ProArtWork 4 · 0 1

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