Air and Water Resistance

Question 1

What do air and water resistance do when an object is moving through air or water

Answer 1

they push against objects

Question 2

How can things go fast

Answer 2

They have to be streamline - means they can slip through the air or water without too much resistance

Question 3

Give the steps for Air resistance slowing parachutists down

Answer 3

1) Gains speed
- At the start the person has the force of its weight
2) Still gaining speed
- the opposing for of air resistance gets more and more
3) Losing speed
- when parachute opens the air resistance opens because there’s much larger area trying to cut through air. The person loses speed and slows down gratefully
4) Steady speed
- Quickly the air becomes equal to the weight - the two forces are balanced. Overall force is 0 so person moves at steady speed
5) No speed
- Once on the ground, the person’s weight acting downwards is balanced by an equal upward force from the ground