Why is the gravitational potential energy of an object 1 meter above the moon’s surface less than its potential energy 1 meter above earth’s surface? a. the object’s mass is less on the moon. b. the object’s weight is more on the moon. c. the object’s acceleration due to gravity is less on the moon. d. both a and c

i believe the answer would be:

d. violin, clarinet, french horn, and tuba

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.