Dane is standing on the moon holding an 8 kilogram weight 2 metres above the ground. how much energy is in the weight's gravitational potential energy store? (on the moon the gravitational field strength is 1.6 n/kg.)

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Aball is thrown from the top of a building with an initial velocity of 21.9 m/s straight upward, at an initial height of 51.6 m above the ground. the ball just misses the edge of the roof on its way down, as shown in the figure. (a) determine the time needed for the ball to reach its maximum height. (b) determine the maximum height. (c) determine the time needed for the ball to return to the height from which it was thrown, and the velocity of the ball at that instant. (d) determine the time needed for the ball to reach the ground. (e) determine the velocity and position of the ball at t = 5.35 s.

What is "decrease in velocity" i need offering 60 !