Physics Lesson: Roller Coaster Problem Conservation of Energy

[getrichquickideas]

can I rub your beard for good luck?

[Candorly]

Wow, I've done very little hw in this unit because I've been so busy, but I aced that quiz today! I got all the answers right. THANK YOU. :D Your videos helped a lot.

[PhysicsEH]

@Candorly Hi. That's great! We don't get to hear the results so it was nice of you to take the time to let us know. Best of luck with your course.

[Bakugantsuvai1]

@PhysicsEH Little off-topic but I have done only five pages of force practice problems and I got 90% on my Forces (No vectors) test.

[Candorly]

I've been falling behind in physics, but I feel more confident now. Quiz tomorrow!

[PhysicsEH]

@Candorly Glad to help. Best of luck on your quiz.

[xoizzzyyyox]

Thank you so much! I now know how to do this problem for my test tomorrow. You taught me more than my teacher has taught me all year long. Thanks! (:

[PhysicsEH]

@xoizzzyyyox Thanks for letting us know. Best of luck on your test!

[Aikyialie]

Very easy to understand. Thank you :]

[lyttylgrenadier]

2 people threw up on the rollercoaster

[PhysicsEH]

@lyttylgrenadier One of them was me.

[ry7ky]

@PhysicsEH at 2:40 yiu have one mass on one side and two on the other, how did they all cancel out?

[JoannaPotts]

THANK YOU BEARDED GUY!! YOU TAUGHT ME MORE IN 3 MINS THAN MY TEACHER COULD IN AN HOUR!!

[PhysicsEH]

@JoannaPotts Glad to help. We love to hear that it made a difference. Tell you friends about us.

[nguyen25520]

very helpful

[PhysicsEH]

@nguyen25520 Thanks, glad to help. Tell your friends about us.

[Ghurbalian]

Thanks

[tchyn82]

Very good. I am a physics tutor and just wanted a quick refresher! This was awesome.

[flagellajello]

THANK YOU!!! :D

[PhysicsEH]

@flagellajello Glad to help!

[Themossers]

Thanks for the video Mr Morin!

[zishhyles09]

how did u find out the 700m

[PhysicsEH]

The gravitational energy at the start is calculated as mgh. The mass is unknown so we leave it as an unknown and just use the letter "m" to represent it. We also chose to use 10 for "g" instead of 9.8. The height at the start is 70m.

The gravitational energy is then mgh or m x 10 x 70 = 700m. The "m" is the unknown mass and NOT the unit for meters.

I hope this helps.

[zishhyles09]

oh thats why..u used 10 instead of 9.8 (:

[bellanei]

Thank you

[PhysicsEH]

Don't give up. You need to know a bit of physics to understand this problem. Best of Luck.

[nicolaloveslewis]

i really want to do Physics but that just confused me maby when i get older i mate understand it :D thanks