Solving Conservation of Mechanical Energy Problems

Physics Ninja looks at a problem of a skier sliding down a slope. Conservation of mechanical energy is used to find the maximum height after taking a jump. We also consider the problem when there is friction slowing him down before the jump.

[@fizixx]

Beautiful problem. It's so nice when everything fits together so nicely!

[@user-sh3lp9xt5w]

So clear and well-explained. Appreciate these videos so much; thank you!

[@lisandrolisandro8100]

I did not study for my exams but watched this before and this video helped me so much. thank you

[@PhysicsNinja]

Glad it helped!

[@shadowkxm]

when we found v at the height 2.0m, how do we know the direction of v? how would we have known that the v is in line with the angle of the ramp? in future questions, what determines whether the v is a v_x or v_y or v of some ramp it's being launched? If the surface was flat, would v be in the x direction i presume?

[@arshchaudhary1986]

Thank sir it helps a lot

[@sophiaumeh4523]

Thank you so much!

[@PhysicsNinja]

You're welcome!

[@pizzasnackrolls2142]

now how in the heck do you do this problem in 3 mins on the exam for ap physics 1

[@athenaaminimd]

I will try to solve this tomorrow and then I will watch It.

[@ultimatekenz]

how come when we're looking for Hmax we're using cosine? I would have thought to use sine and Vy instead

[@SatyajitMahapatra-ss3kp]

😢I'm also thinking that

[@user-ff1sn3pg9f]

yeah that sucks, yeah not explain all the things clearly , he just gave us the results ... not explatin them at all

[@rayocenda]

@@SatyajitMahapatra-ss3kpbecause at Hmax the y component of velocity is =0 , while the x component of V is always constant (that's an important characteristic of the projectile motion)

[@vikashsinghyt2454]

For which standard do you guys, in your country or state study theese kind of problem age guess?

[@flyvandejacobs3337]

16/17/18

[@viktor5534]

14/15/16

[@petersikiaibaura3572]

Sir, Why is the value of gravity is not equal to negative -9.8m/s^2?

[@wiljamvandijk152]

If that were the case you would GAIN gravitational energy when you move down rather then lose gravitational energy which gets converted to kinetic energy

[@solawo]

Nding