Air and Water Resistance
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What do air and water resistance do when an object is moving through air or water
they push against objects
How can things go fast
They have to be streamline - means they can slip through the air or water without too much resistance
Give the steps for Air resistance slowing parachutists down
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