When you blink your eye, the upper lid goes from rest with your eye open to completely covering your eye in a time of 0.024 s.
a. estimate the distance that the top lid of your eye moves during a blink.
b. what is the acceleration of your eyelid? assume it to be constant.
c. what is your upper eyelid's final speed as it hits the bottom eyelid?

You are driving directly behind a pickup truck, going at the same speed as the truck. a crate falls from the bed of the truck to the road. (a) will your car hit the crate before the crate hits the road if you neither brake nor swerve? (b) during the fall, is the horizontal speed of the crate more than, less than, or the same as that of the truck?