Question

Tennis ball on cardboard roller coaster question help please!

Determine the kinetic energy at the bottom of the first hill and calculate the
velocity at this location. Assume friction is negligible.


So I already know the kinetic energy is the same as the potential energy. I just pretty much do not understand how to get the velocity. I will attach the photo of the cardboard roller coaster model. The weight of the tennis ball is also .057kg.

I know this is kind of a physics question, but I cannot seem to get an answer in that section, this is also kinda a math question.

Answer 1

@phi @satellite73

Answer 2

@jim_thompson5910 @.Sam. @Luis_Rivera @ghazi

Answer 3

See http://www.physicsclassroom.com/mmedia/energy/ce.cfm

The potential energy at the top of the hill is converted to kinetic energy at the bottom of the hill.

Potential Energy (P.E.) at top = Mass * g * height
Kinetic Energy= 0.5 * Mass* velocity^2
in this case, all the potential energy at the top of the hill equals the KE at the bottom
P.E (at top) = K. E. solve for P.E at the top and that is the answer to part (a)
P.E (at top) = 0.5 * Mass* velocity^2


so you have
Mass * g * height = 0.5 * Mass* velocity^2
solve for velocity