You set up a race between two objects, releasing them from rest at the top of a ramp. The first object is a block with a very slippery surface - it slides down the ramp with negligible friction. The second object is a sphere that rolls without slipping down the ramp. Which object reaches the bottom of the ramp first?

1. The block.
2. The sphere.
3. Both objects reach the bottom at the same time.
4. Not enough information is given - it depends on which object is heavier.