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Q. A flat (unbanked) curve on a highway has a radius of 200 m. A car rounds the curve at a speed of 18.0 m/s.

What is the least coefficient of friction that would prevent sliding?

Q. After a 0.200 kg rubber ball is dropped from a height of 1.90 m, it bounces off a concrete floor and rebounds to a height of 1.45 m.

(a) Determine the magnitude and direction of the impulse delivered to the ball by the floor.

(b) Compute approximately the time the ball is in contact with the floor to be 0.04 seconds. Compute the average force the floor exerts on the ball

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