posted by Anonymous .
A boy kicks a rock off a cliff with a speed of 19.4 m/s at an angle of 52.5° above the horizontal. The rock hits the ground 5.41 s after it was kicked.
a) How high is the cliff? (I found the height to be 60.3 m)
b) What is the speed of the rock right before it hits the ground?
c) What is the maximum height of the rock measured from the top of the cliff?