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A toy cannon uses a spring to project a 5.38-g soft rubber ball. The spring is...

A toy cannon uses a spring to project a 5.38-g soft rubber ball. The spring is originally compressed by 4.98 cm and has a force constant of 7.94 N/m. When the cannon is fired, the ball moves 15.6 cm through the horizontal barrel of the cannon, and the barrel exerts a constant friction force of 0.031 7 N on the ball.

(a) With what speed does the projectile leave the barrel of the cannon? (m/s)

(b) At what point does the ball have maximum speed? cm (from its original position)

(c) What is this maximum speed?

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