Question

1. Which of the following frictionless ramps (A, B, or C) will give the ball the greatest speed at the bottom of the ramp? Explain.

Answer 1

no one... the speed at the bottom depends just the vertical distance... for three ramps is the same

Answer 2

Are you sure?

Answer 3

@mayken

Answer 4

I agree with @mayken. the only acceleration acting on the ball is g in the vertical direction. and the displacement in that direction is same for all ramps.
so, using this info in v^2 = u^2 + 2as
we'll get, v^2 = 2gs.
now g and s for all three are same. hence the speed of the ball will be the same irrespective of which ramp it takes.

Answer 5

dont know...

Answer 6

If the ramps are the same starting height, the speed at the bottom must be same, because of Conservation of Energy.