A rock of mass m is thrown horizontally off a building from a height h as shown above. The speed of the rock as it leaves the thrower's hand at the edge of the building is vo
How much time does it take the rock to travel from the edge of the building to the ground?

Ahydroelectric plant takes energy from water and turns it into electrical energy. what are the transformations of energy in the water molecules that are used in the process of generating electricity this way?

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.

Abar magnet cut in half will form a total ofpoles.a)fourb)eightc)two