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?

they are non-matter

explanation:

they are non-matter. basically, any type of energy or any abstract concept is an example of something that does not matter. other examples include dreams, magnetism, radio, and hate

answer; equivalent to a one(1) horsepower motor;