To determine the displacement of the rock, we need to consider its upward motion and its downward motion separately.
First, let's calculate the displacement during the upward motion. The rock is thrown straight upward from the edge of a 30 m cliff, rising 10 m. This means the rock will reach a maximum height of 10 m above the starting point (edge of the cliff). The displacement during the upward motion is 10 m.
Next, let's calculate the displacement during the downward motion. Since the rock is falling all the way down from the maximum height it reached, the displacement during the downward motion will be the negative of the displacement during the upward motion. Therefore, the displacement during the downward motion is -10 m.
To find the total displacement, we add the displacements during the upward and downward motions:
Total displacement = displacement upward + displacement downward Total displacement = 10 m + (-10 m) Total displacement = 0 m
Therefore, the total displacement of the rock is 0 meters.