3. (Con't)

c. (5 points)

Will you answers in part(a) and part(b) change if the rock is thrown vertically downward (with the same initial speed of 15 m/s) instead of upward? Please explain.

Answer:

No, answers in (a) and (b) do not depend on whether the rock is thrown upward or downward. If the rock is thrown upward, it will fall back to the child's level at the same speed.