The coefficient of kinetic friction is NOT Question 25 options:

the slope of the line on the kinetic friction force vs. normal force graph.

designated μk.

more than the coefficient of static friction.

equal to the quotient of the kinetic friction force and the normal force.

In a game of pool, ball a is moving with a velocity v0 of magnitude v0 = 15 ft/s when it strikes balls b and c, which are at rest and aligned as shown. knowing that after the collision the three balls move in the directions indicated and assuming frictionless surfaces and perfectly elastic impact (that is, conservation of energy), determine the magnitudes of the velocities va, vb, and vc.