Kinetic Energy: Example Problems

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Күн бұрын

This video gives an explanation of kinetic and contains several examples for calculating kinetic energy, mass and velocity using the kinetic energy equation.
Kinetic energy is the energy an object possesses due to its motion. If an object is in motion then it has kinetic energy. It is also defined as the work needed to accelerate an object from rest to its known velocity. The object will maintain its kinetic energy unless a force acts upon the object to change its velocity. The same amount of work is done on the body when stopping it from its known speed to a state of rest. This is known as the work energy theorem.
There are different types of kinetic energy such as vibrational and rotational kinetic energy. This video will focus on translational kinetic energy. That is the energy of an object as it moves from one place to another.
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Пікірлер: 122

@dido1803 4 жыл бұрын

Thank you for taking the time to explain this equation. Your presentation always great.

@stepbystepscience 4 жыл бұрын

Glad it was helpful! And thanks for commenting.

@hwburner1524 3 жыл бұрын

thanks. i needed to figure this out in a pinch for physics. great job

@stepbystepscience 3 жыл бұрын

Glad it helped!

@janet4690 3 жыл бұрын

Thank you for this!

@celeste7418 2 жыл бұрын

I have a Physics test tomorrow and this really clarified and gave me good tips to follow thank you for the help!!!

@stepbystepscience 2 жыл бұрын

Best of luck!

@lolitamulugeta8776 2 жыл бұрын

Me too 😭

@angelakate9922 3 жыл бұрын

Thank you for this, this is so helpful and easy to understand. 💖💖

@stepbystepscience 3 жыл бұрын

You are very welcome!

@iluis6313 3 жыл бұрын

Thank you for making this just actually really helped

@stepbystepscience 3 жыл бұрын

That's wonderful, you're very welcome!

@crazyt-sl2jx 2 жыл бұрын

Why did u remove the 1 byt2?

@aegchannel7369 3 жыл бұрын

Thank you so much for teaching me and sharing this video! yay :D

@stepbystepscience 3 жыл бұрын

You are so welcome! Glad you liked the video.

@aegchannel7369 3 жыл бұрын

@@stepbystepscience you helped me to solve my science and math problems. :D

@07mrittika53 2 жыл бұрын

Thank you! It helped me a lot teacher.

@stepbystepscience 2 жыл бұрын

You're welcome. Glad to hear that!

@joshuafrey3277 3 жыл бұрын

Thanks! Great video!

@stepbystepscience 3 жыл бұрын

You're welcome! Glad you liked it.

@terencewright2223 2 жыл бұрын

Excellent video,thank you very much.

@stepbystepscience 2 жыл бұрын

So nice of you, you're welcome!

@jonathonkhan8260 Жыл бұрын

Breathes in very hard 😮‍💨 Thank you sir for taking your time to make this video this was very helpful 🫠

@stepbystepscience Жыл бұрын

Glad it was helpful!

@user-cx5jk3lk9p 3 жыл бұрын

how did u get 25 m/s at the last example? i thought we multiply 140 by 2 then divided by 0.45 45÷28000=512.2 sorry if im wrong but pls help me

@sa_0515 3 жыл бұрын

280 divided by 0.45 is 622.222... It is close to 625 which is the square of 25. When you take the root of it you would get 25

@demonoftheapocalypse240 3 жыл бұрын

@@sa_0515 thanks I was confused as well.

@irvinwong6428 2 жыл бұрын

I have science finals tomorrow. Thank you for helping me relearn!

@stepbystepscience 2 жыл бұрын

Best of luck!

@miraculouslucy8037 3 жыл бұрын

Umm ..I don't understand what to use to get 120.000J ? Is it division or multiplication?

@stepbystepscience 3 жыл бұрын

It is 0.5 x 600 x 20 x 20 =120 000 J

@gedeonmubenga4743 3 жыл бұрын

You are very clear thank you so much

@stepbystepscience 3 жыл бұрын

You’re welcome, glad the video was helpful.

@manalotojohnlemuelh.7405 2 жыл бұрын

thank you very much. very helpful..

@stepbystepscience 2 жыл бұрын

Glad it helped!

@hayatmuzain3681 2 жыл бұрын

Thank you, was very clear

@stepbystepscience 2 жыл бұрын

Glad it helped! You're welcome!

@uosfdlshadhusaen2429 3 жыл бұрын

Thank you really you make it easy

@stepbystepscience 3 жыл бұрын

So glad you think so, thanks!

@lorinajamis332 3 жыл бұрын

Thank you for everything

@stepbystepscience 3 жыл бұрын

Any time, thanks for watching!

@KulwinderSingh-mi1iw Жыл бұрын

thank you so much sir for this explanation

@stepbystepscience Жыл бұрын

You are most welcome, all the best.

@enhypenjayace6417 3 жыл бұрын

Is ½ similar to 0.5?

@stepbystepscience 3 жыл бұрын

It is the same thing, they are both one half.

@reena1609 3 жыл бұрын

how did you get the last answer??

@stepbystepscience 3 жыл бұрын

I explained it right in the video

@koreenadeleurme4338 4 жыл бұрын

This really helped me thank you appreciate it sure wish there was someway you could click into the homeschool sites. You explained it so easy.

@stepbystepscience 4 жыл бұрын

You are so welcome!

@wu4243 3 жыл бұрын

You did a great job to explain it's just i have a hard time understanding

@stepbystepscience 3 жыл бұрын

I hope the video and example problems help.

@slayyyyyyyyyyyyyyyyyyyyyyyyyed Жыл бұрын

nice u gave all the formulas ily

@stepbystepscience Жыл бұрын

Happy to help, thanks for the comment

@Yes_amyysimps Жыл бұрын

Thanks, I'm here at 2022 and tryna understand this topic for my physics quiz.

@stepbystepscience Жыл бұрын

Good luck on the quiz!

@6mdm 3 жыл бұрын

How do I know how much energy a joule is? If you say a joule is like a refrigerator sitting on ur head then I can grasp this.

@stepbystepscience 3 жыл бұрын

Here is a video that explains it: kzfaq.info/get/bejne/eL-gjbaVuKvPZHU.html I hope that it's helpful.

@YahayaIdris-sd6eh 3 ай бұрын

How do you know you are to divide the K.E at the second example

@stepbystepscience 3 ай бұрын

Do you mean for the girl and bicycle problem? And I am not sure what you mean by, "divide the KE". But you want to solve for the mass and it is v^2 times the mass, so to get the mass to the other side you have to divide both sides by the v^2. Does that help?

@stepbystepscience 3 ай бұрын

Do you mean the girl and bicycle problem? And I am not quite sure what you mean by "divide the KE". But you want to solve for the mass and the mass is multiplied times the v^2 so you have to divide both sides by the v^2. Does that help?

@NitinKumar-fy6rh 3 жыл бұрын

Thanku so much it helped me a lot ❤️❣️

@stepbystepscience 3 жыл бұрын

Glad it helped, you're very welcome!

@SylvesterkK 2 жыл бұрын

@@stepbystepscience hi

@JameGano 2 ай бұрын

Thank you for helping me

@stepbystepscience 2 ай бұрын

It's my pleasure, thanks for watching!

@theagabrieldomingo3780 3 жыл бұрын

how did it become 120, 000 j? I'm confused can somebody explain it to me :((

@arleneazurin 3 жыл бұрын

The problem was KE = 0.5 (600kg) (20m/s)^2 First do the (20m/s)^2 so that would be 20 times 20 and that is equal to 400. So now we have this... KE = 0.5 (600kg) (400m/s) Now multiply the mass and velocity... 600kg multiplied by 400m/s is equal to 240,000 So now we have this... KE = 0.5 (240,000) Then multiply 240,000 to 0.5, that is equal to 120,000 J So the KE = 120,000 J Always remember to put the unit J that stands for joules when finding the Kinetic Energy.

@stepbystepscience 3 жыл бұрын

Thanks for helping out!

@raunakjha15909 3 жыл бұрын

Very well explanation.This helps me a lot.

@stepbystepscience 3 жыл бұрын

Glad it helped.

@kerrybutler5560 2 жыл бұрын

Very helpful

@stepbystepscience 2 жыл бұрын

Glad to hear that, thanks!

@katsura_grey 4 жыл бұрын

Thank you so much for the video 🙏

@stepbystepscience 4 жыл бұрын

My pleasure 😊

@Starkcire 3 ай бұрын

Show your work step by step. So it's understandable

@stepbystepscience 3 ай бұрын

I did, that is why the channel is called Step by Step Science.

@ajaysampath9199 4 жыл бұрын

Subscribed..

@stepbystepscience 4 жыл бұрын

Awesome!

@lizz._.8098 3 жыл бұрын

I have a test tmr, atleast ik i wont fail :)

@stepbystepscience 3 жыл бұрын

That's great to hear. Good luck!

@casinovathedon8924 4 жыл бұрын

Thanks a lot!

@luwaarosina8511 4 жыл бұрын

It's well explained thanks very much...

@stepbystepscience 4 жыл бұрын

You are very welcome and thank you for commenting.

@paaastaaa2554 3 жыл бұрын

@@stepbystepscience hello how did you get 25 m/s?

@rainpark100 3 жыл бұрын

Thanks for making this video it helped me

@stepbystepscience 3 жыл бұрын

Glad it helped and thanks for commenting.

@grahamflowers 2 жыл бұрын

Kinetic energy is the energy that can do work not just the energy of motion that is Mv squared force regards Graham Flowers

@stepbystepscience 2 жыл бұрын

Yup, that's right

@aadamhussain1934 3 жыл бұрын

Wind turbine blade with a kinetic energy of 104040J, turning at 6m/s.

@user-hc6kh1ny9h 2 жыл бұрын

Thank you so much this helped me a lot... *Sorry for the Gramma

@stepbystepscience 2 жыл бұрын

You're welcome. Glad it helped!

@AmielLukeeeee 3 жыл бұрын

uh how it became 120,000J?

@hwburner1524 3 жыл бұрын

read one of the comments, there is a reply explaining the whole thing.

@PrestineReady 9 ай бұрын

It has a power 2 up

@Business_Cat564 8 ай бұрын

0.5 X 600 X 40 raise to 2 and then its 120,000J or 0.5 (600) (40) raise to 2 and its just the same 120,000J

@jhoncarlotabug Жыл бұрын

Answer 120.000 J this is correct or no

@alagbesekinah740 2 жыл бұрын

Thanks 💪🏻💪🏻💪🏻💪🏻😘

@stepbystepscience 2 жыл бұрын

Welcome!!

@sydneyposadas7333 2 жыл бұрын

i don't understand

@njw8356 3 жыл бұрын

How u get 120000 for 20 squared

@stepbystepscience 3 жыл бұрын

0.5 x 600 x 20 x 20 = 120 000, just like that. Does that answer your question?

@njw8356 3 жыл бұрын

@@stepbystepscience ye idk what grade i got yet

@mad_max_169_gaming2 2 жыл бұрын

Thanks a lot.I have a suggestion that can you speak a little clearly.

@stepbystepscience 2 жыл бұрын

I will try my best

@grahamflowers Жыл бұрын

There is no kinetic energy in a moving mass there is force Mv squared kinetic energy is the energy of consistent work from a consistent force regards Graham Flowers

@6mdm 3 жыл бұрын

@laxmishiva4995 2 жыл бұрын

Last question answer wrong sir

@stepbystepscience 2 жыл бұрын

What is wrong with it?

@basedqacist7526 2 жыл бұрын

Being forced to watch this for physics rn

@stepbystepscience 2 жыл бұрын

lucky you!

@gelidofamilia1202 3 жыл бұрын

who is grade 6 here ? lol my teacher doesnt even explain this nice

@user-rq1xy6nc4o Жыл бұрын

pls when you are talking take your time😢😢

@stepbystepscience Жыл бұрын

Ok, will try!

@danielzwyneendong1242 10 ай бұрын

I thought 12,000

@stepbystepscience 9 ай бұрын

maybe

@6mdm 3 жыл бұрын

Ok ill be the stupid person. You say energy is 120,000 joules. This means nothing to me. Explain how I can relate that to real world to understand? Like if you day thats a stove sitting on your hand... that’s how it feels.... then i have some understanding of how much energy that is. I know I should know more but U don’t. 😁

@stepbystepscience 3 жыл бұрын

Very good question, From PE =mgh If you carry a 100 kg mass up a height of 120 meters you will do 120,000 J of work. Does that help? Here are some other examples: The amount of energy one utilizes in lifting a cup of water from the table to one's mouth equals approximately 1 Joule. One "dietary Calorie" is 4186 J (4.186 kJ). One gram of gasoline releases about 50 kJ on combustion in air. A small car (about 1200 kg) travelling at 65 miles per hour (105 km/h) has a kinetic energy of 1 megajoule (1 MJ). One "kilowatt-hour" is 3.6 MJ. One ton of TNT releases 4.184 GJ on exploding.