Work and Energy

064 - Work and Energy

In this video Paul Andersen explains how the mechanical energy added or removed from a system results from work. For work to occur a force must act parallel to the displacement of the system. Since work and energy are equivalent the work-energy theorem allows of for calculating the work as the change in kinetic energy. A force-displacement graph can be used to calculate the work done on the system.

Do you speak another language? Help me translate my videos:

Music Attribution
Title: String Theory
Artist: Herman Jolly

All of the images are licensed under creative commons and public domain licensing:

[gorillalace]

Going insane, Just watched 40 physics videos.

[QuentinDaniels]

How many times have I wondered over figuring out something of this sort, in light of spent energy... Awesome Paul! I appreciate the explanation!

[SuvrathHegde]

Why dont you make a video on solving work and energy sums using calculus. We have to use calculus while solving work and energy sums.

[Tanelicraxs]

Um wait, what did you do with cosine formula to solve the adjacent side if we dont know the hypothenuse? Could you explain a bit? I understand it so that
38 = cos^(-1) ( adjacent/hypothenuse )
but I dont quite get where we will get the length of the hypothenuse
Help me please!

[pranavsood]

Work work work work work work see me haffi work work work work work work

[kiongszelim]

A doubt. If an object is having a potential energy, so, due to the transformation of energy, its potential energy can transform to kinetic energy or other energy. So, if a kinetic energy is applied to it, will it combine with the original potential energy and thus, the final energy released by it, can it be a combination of both forms of energy? The theory of conservation of energy, does it mean, any object will have potential energy? So, in the nergy transformation, is it a combination or, the potential energy is unused but, it is only affected by the kinetic energy? If gravitational force is a kinetic energy, when it is applied to an object, will it induce also the release of potential energy? If so, will the object falls faster when 2 kinds of energies are combined?

[junng]

Is typing on a computer keyboard consider work in physics sense?

[Castheknotted]

At about 4:40 you say 128J instead of 120J. Just to let you know.

[chipwhitley]

You remind me of Mark Watney from The Martian claiming he is still alive

[SYNTAXEROL]

w=fore x distance cos theta or =force x displacement x costheta? im consfused

[mikeomari]

Mr Anderson, every video I've seen you in, you seem to be progressively aging..

[BraydenJL]

dude be out here looking like CallMeCarson ordered off Wish