Physics Hwk.Problem:Rotational Kinematics

[shawonna23]

At the local swimming hole, a favorite trick is to run horizontally off a cliff that is 6.2 m above the water. One diver runs off the edge of the cliff, tucks into a "ball," and rotates on the way down with an average angular speed of 1.4 rev/s. Ignore air resistance and determine the number of revolutions she makes while on the way down.

I am really stuck on this problem. What equation would I use?

[cepheid]

1) How much time does it take an object in free fall (neglecting air resistance) to fall 6.2m? Do you know the kinematics of bodies in free fall? I'm wagering yes.

2) During this time, how many rotations would an object rotating at 1.4 revolutions per second undergo?