Question

A cannonball (20kg) is fired at an angle --its initial speed upon leaving is 100m/s and the ball reaches a height of 180 meters. Assume no friction and g=10m/s2. What is the initial kinetic energy when the ball leaves the cannon?

Answer 1

Step-by-step explanation:

Kinetic energy = 1/2 m v^2

= 1/2 ( 20 kg) * (100 m/s)^2 = 100 000 J