The buoyant force is cause by the pressure of displaced fluid pushing up on the object that is displacing the fluid. It acts in opposition to gravity. What is the net force of a piece of Styrofoam submerged in the water that is being pulled down by 20 N of gravity and pushed up by 100 N of the buoyant force? A. 80 N upward
B. 120 N upward
C. 80 N downward
D. 120 N downward

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.

statement #3 on andre"s list is false.

i really dont know but i will try okay.

so i think u would just add all them up and get your answer..