A solid ball and a hollow ball, each with a mass of 2 kg and radius of 0.1 m, start from rest and roll down a ramp of length 3 m at an incline of 44°. An ice cube of the same mass slides without friction down the same ramp.
What is the speed of the ice cube at the bottom of the incline?
Also could you explain why the ice cube reaches the bottom first, is it because there is just no frictional forse?