A 28kg dog is running up a hill at 14m/s. If the hill is 20m high and the dog continues to run at this speed, how much is the dogs total mechanical energy at the top of the hill? Take that the dog's potential energy is zero at the bottom of the hill.

Suppose that a cylindrical tank 6 meters high with a radius of 2 meters is filled to the rim with water. the tank is buried so that the top of the tank is 1 meter below ground level. the space above the tank is not filled with water. calculate how much work needs to be done by a pump to pump the water out of the tank up to ground level. (the water weighs 9,800 newtons per cubic meter.)