Potential energy stored in a spring

Work needed to compress a spring is the same thing as the potential energy stored in the compressed spring.

Category:

Education

Tags:

• spring
• hooke's
• potential
• energy
• work
• physics

[krirosfor]

potential energy is mgh, BUT in a spring it's 1/2 kx (X)

[polos505]

I thought that the

kenitic energy =1/2*mv(v)

potential energy=mgh

how come you used potential energy=1/2kx(x) ? anyway,thanks for the beautiful explaining.I learn a lot..

[stfrankies240]

man you have helped me a lot..thank u very much

[owaisoz]

is it that when force varies, we use integration to get work ?

[ZacharySmith89]

@aznf0rl1fe False, KhanAcademy now has many people behind the scenes.

[LookItsZander]

@aznf0rl1fe If you gave all these lessons, you would spend alot of time doing these videos. which means you can't have a job.which means you have no money to live. and so, ta-da!

[mrRnf11]

@keagleeye It means the same thing, final-initial extension is assumed.

[keagleeye]

elastic potential energy is actually 1/2KdeltaX^2 ...

[newhyperbeamattack]

@polos505

Compressing a spring is different from lifting a mass in the air. If you lift a mass in air from a distance of y=0 to y=20, you are exerting the same force at all times when you do work against gravity. However, when you compress a spring, the amount of force you need to apply is different at different x values (for example, if you want to compress from x=0 to x=5, you need to apply more force when you are at x=4 than at x=3). This is how I understood it and this makes them different.

[shikharsingh007]

W=f.d and my physics= xd

[aznf0rl1fe]

why does khan academy need money? isnt it nonprofit lol and only sal is doing it.

[lumaix]

I'd been watching khans videos all day long and feel asleep at the beginning of this video after pausing it... I dreamt a dream of people running around shouting their velocities and acceleration and woke up to lots of people outside running in the street shouting at each other- except it wasn't velocities O_O