The velocity of the water skier increases from 4.0 m/s to 16.0 m/s in 8.0 seconds, what is the acceleration of the water skier?

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.

The force needed to overcome static friction is usually less than that needed to overcome kinetic friction.true or false?

What is an example of static friction