Two boxes sit at the top of two straight ramps of the same height. One ramp is steeper than the other (makes a greater angle with the horizontal). If the two boxes are released from rest and slide down the ramps without friction, which will be travelling the fastest when they reach the bottom of the ramps? Why?

A The both have the same speed at the bottom.
B The box on the steeper ramp.
C The box on the less-steep ramp.
D The box that has the greatest mass.

Which box will arrive first at the bottom of the ramp? Why?

A The box on the steeper ramp.
B Both arrive at the bottom at the same time.
C The box on the less-steep ramp.
D The box that has the greatest mass.