Ayoung girl stands at the edge of a cliff, holding one ball in each hand. at time to, she throws one ball straight up with speed vo and the other straight down, also with speed vo. for the following questions neglect air resistance. pay particular attention to whether the answer involves "absolute" quantities that have only magnitude (e. g., speed) or quantities that can have either sign (e. g., velocity). which ball has the greater average speed during the 1-s interval after release (assuming neither hits the ground during that time)?

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.

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.