A small car bumps into a large truck.
Compare the forces that the truck exerts on the car (F_truck on car) and the car exerts on the truck (F_car on truck) if before the collision the truck was stationary and the car was moving.

They are equal.

Explanation:

Newton's 3rd Law tells is that the forces of an action/reaction pair are equal and opposite. Since F_truck on car and F_car on truck are an action/reaction pair, they are equal no matter their state of movement before the collision.

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.