Students investigated the motion of wooden blocks on ramps. They used two boards,
each two meters long, to create ramps. They set the ramps up at different heights, as
shown in the diagram below. Next they took two identical blocks (I and II) and placed
one at the top of each ramp. They placed the blocks so that the back edge of each
block was even with the edge of the ramp (distance =0 meters). The students held the
O
blocks so that the blocks would not slide until the students released them. The students
released the blocks at time = 0 seconds. They measured the total distance traveled by
each block at 1-second intervals as the blocks slid down the ramps. The students recorded
their results as shown below.

Name two forces that acted on the block as they slide down the ramps. Describe how each forced you listed affected on the motion of the block.