A cell phone weighing 80 grams is flying through the air at 15 m/s what is the kinetic energy?

"an open tank has the shape of a right circular cone. the tank is 6 feet across the top and 5 feet high. how much work is done in emptying the tank by pumping the water over the top edge? note: the density of water is 62.4 lbs per cubic foot."

What kind of simple machine is a catapult?

Coal contains energy. a. light b. kinetic c. chemical d. mechanical