Question

At the local swimming hole, a favorite trick is to run horizontally off a cliff that is 6.76 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 3.29 rev/s. Ignore air resistance and determine the number of revolutions she makes while on the way down.

Answer 1

time of flight be t.so,

h=0.5 gt^2

or 6.76=0.5*9.81*t^2

or t=1.17 s

so number of rev=3.29*1.17
3.85 rev