Energy, Work, & Power, (1 of 31) Kinetic Energy, An Explanation

Explanation of kinetic energy, the units and the relationship of the kinetic energy of an object to its mass and velocity.

Kinetic energy is the energy that an object has due to its motion. It is defined as the work needed to accelerate an object from rest to a specific velocity. The same amount of work must be done on the object to bring it from the given velocity back to rest. Kinetic energy is directly proportional to the mass of the object and the square of its velocity. The SI unit for kinetic energy is the joule.

Gravitational potential energy is the energy that an object has due to its position relative to other objects. Potential energy is often referred to as stored energy. Gravitational potential energy is dependent on the mass of the object, the acceleration due to gravity (9.81 m/s2) and the change in height of the objects. The SI unit for kinetic energy is the joule

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[paulnicholas]

I came here looking for a simpler explanation of what "Energy" really is in an object, yet I found the way you explain everything SO understandable and enjoyable to follow along that I watched the whole the video (the rest of the 6 minutes after you explained kinetic energy). Great content man!

[melnash]

Saved my physics, bless you keep making

[demimond]

Nice explanation, but you did not explain where the 1/2 comes in. Why multiply by !/2? What is the logic behind that?

[flacaracorbului]

Amazing explanation. Simple yet elegant and very understandable

[Flossy.woo]

u the best you saved me so many times in my tests. Saw all your 31 videos for this section well worth the time.

[kaylariesenberg]

This helped me understand so much more then my teacher explaining this.

[colleenpoulin]

This was a very clear video explaining kinetic energy. Great job, thank you!

[stepbystepscience]

Awesome, I am glad that you did and thanks for letting me know!

[berttruffel]

Why is it simply not directly proportional to the velocity Instead of the velocity squared?

[dakotaskong]

Thank you for easy explanation :) all teachers and educational YouTubers should explain easy

[FUTUREGAMER-jtmj]

i no this vid is kinda old, and its been like 4 years, but i have a question. im doing an egg drop science project. so i need less mass and smaller speed to get the best chance of a good contraption?

[shayerahol]

This was so helpful and you explained it very well! Thank you!

[shinethief]

This video really helped me for my mechanics test I had to retake. My notes were useless so thanks.

[mahendradhalen]

thankyou sir it's really help me in my class test " the kinetic energy"👍

[lucbrink-morrison]

Am I right in thinking, if two objects have the same kinetic energy (same amount of joule) but one has more mass that the other, the one with less mass will have a higher velocity. Correct?

[johnguillen]

I’m understanding this more by watching your videos. I have smart students in my class who want to finish the problem faster than the other and I can’t keep up with that speed. It becomes annoying.

[ChrisreadIRL]

Goddamn man. That was very good. You’re a teacher I could learn from no bullshit

[Yours--Truly]

My question is why *1/2* to the mv^2? Force is mass x acceleration, & KE formula seems similar, except for the *1/2*

[mirceaandreighinea]

i think friction with air or friction from contact to ground has NOTHING to do with those values... (meaning double speed translated into quadruple kinetic energy). which means those friction will add up. what do you think?

[shemainesanchez]

Nice video. It was easily understood. I teach Science in Junior High School but Physics is not my forte. This was helpful.