Potential Energy Equation (GPE = mgh)
Kinetic Energy Equation (KE = 1/2 mv2)
1) An object has a mass of 25 kg and is sitting on the top shelf at a store that is 10 m high; find
the object's gravitational potential energy

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.