Aboy exerts a force of 225 n on a lever to raise a 1250 n rock a distance of 0.13 m. if the lever is frictionless, how far did the boy have to move his end of the lever?

"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 properties of a moving object are used in determining the object's energy of motion

How are the crust and the inner core alike? a) they are both solid. b) they both have the same temperature. c) they are both under the same pressure. d) they are both very close to the center of the earth.