The diagram shows a block sitting on a ramp that is inclined from the
horizontal at an angle theta. Let's ignore any friction between the block and
the ramp for the moment. The block is initially prevented from moving, but at
time t=0 it is released. What does your physical intuition tell you about
what should happen next? What does the angle theta have to do with it?

Click here for an answer.

The block will slide down the ramp, picking up speed (accelerating) as it goes.
The steeper the ramp, the faster the block will go.