A40 kg box is placed on a 2 m tall shelf. a. what is the gravitational potential energy of the box? b. if the box falls off the shelf, what is its kinetic energy as it strikes the ground? c. what is the velocity of the box immediately before it strikes the ground?

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

How much energy must a refrigerator absorb from 225 g of water so that the temperature of the water will drop from 35°c to 5°c

According to newton’s law of universal gravitation, which statements are true? as we move to higher altitudes, the force of gravity on us decreases. as we move to higher altitudes, the force of gravity on us increases. as we gain mass, the force of gravity on us decreases. as we gain mass, the force of gravity on us increases. as we move faster, the force of gravity on us increases.