Imagine what it would be like if there were suddenly no air resistance. Explain three differences you might notice in the world around you.

While air resistance can be a nuisance for a car trying to
get higher gas mileage, there are also a number of cases where air resistance is
desirable.

For example, air resistance is the reason that a
parachute brings a person safely and slowly to the
ground

The resistance of the air allows planes to
fly.

If there was no air resistance all objects would fall
to the ground at the same rate - so if you dropped a piece of paper and a rock from the
same height, they would hit the ground at the same
time.

For objects that were falling through the air, there
would be no terminal velocity - the objects would keep accelerating until they hit the
ground.