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?

answer: a. estimate the distance that the top lid of your eye moves during a blink.

explanation:

volume: 22

density: 7.04

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.