the potential energy of a 40 kilogram cannon ball is 14000 joules. How high was the cannon ball to have this much potential energy?

35 m

Explanation:

Potential Energy of a particle of mass m at a height h is given by

P = mgh. where P denotes the potential Energy of the particle.

For cannon ball,

mass (m) = 40 Kg. (Given)

P = 14000 Joules. (Given)

Now, let cannon ball was at height h, then,

14000 = (40) (10) h

h = 35 meters

So, cannon ball has to be at height 35 meters.