# Storing energy?

How can kinetic or mechanical energy be stored?

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BvU
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2019 Award
On a shelf, in a flywheel, in a water reservoir, etc.

DrClaude
Mentor
How can kinetic or mechanical energy be stored?
Is this a homework question?

BvU
Homework Helper
2019 Award
I see you haven't been welcomed ...

So here it is: Hello Darnell, !

My answer reflects the terseness of your question; if you would provide a little more context perhaps we can give better help.

On a shelf you can place a weight (or you can lift the weight on an old-fashioned clock) Height times mass time graviational acceleration is energy ##E_{\rm pot} = mgh##.
A spinning flywheel represents kinetic energy, to the tune of ##{1\over 2} I \omega^2##.
One can pump water into a reservoir such as Lake Mead and later recover the energy in the Hoover dam turbines.

Energy conversions and energy storage are big, big business around the world.

There's a nice thread on storing energy by letting heavy trains climb hills in the desert (ARES)

CWatters
Homework Helper
Gold Member
Yes welcome to the forum.

Do you have to store the kinetic energy in that form or can you convert it to another form and back again? For example when an electric car wants to slow down it can convert it's KE to electrical energy and store it in a battery.

DrClaude
Mentor
Thread will be lock until OP can answer whether this is homework or not.

OP, send me a PM if this is not homework.

BvU