Question

alculate the final speed of a 1500 kg roller coaster if it has an initial speed of 16 m/s but reduces its elevation by 8.6 m by coasting down a frictionless incline.

Answer 1

final KE=Intial KE+initial PE
1/2 m v^2= 1/2 m 16^2 + mg 8.6

solve for v

Answer 2

what mass do i use?

Answer 3

doesn matter, it divides out. If you want, use 1500kg