1. The “F” word:
Centrifugal force - the sensation that you are being flung outward.
Car acceleration forward - flung back
Car accel centripetally - flung outside
Sunglasses going out the window
Fenders on bikes

2. Centrifugal vs. Centripetal
Centripetal - toward the center.
Demo - float in jar - linear and centripetal accel
Centrifugal - away from the center
Things sliding to outside of car on corner
(accel forward, thrown back, accel middle, thrown outside)
Merry-go-round
Mud off bike tire
Water from salad in salad spinner
Sunglasses out the window and the F word.
(Perceived force - not real)