Conservation of Energy: In a wild shot, Eric tosses a ball of mass 0.8 kg off a 0.68 m high pool table and the
the ball hits the floor with a speed of 6.0 m/s. How fast was the ball moving when it left the pool table?

The solution for this problem is:

In 10.1 seconds the earth rotates by 10.1 /(24*60*60)*360 deg = 0.04208333 deg 

In that time a triangle has been created with the 2 longer sides having lengths r and r+1.95 

Cos (0.04208) = r/(r+1.95) 
= 0.999

r(1-0.999) =1.95*0.999 
r = 1948.05m