A toy cannon uses a spring to project a 5.22-g soft rubber ball. The spring is originally compressed by 4.99 cm and has a force constant of 7.94 N/m. When the cannon is fired, the ball moves 15.9 cm through the horizontal barrel of the cannon, and the barrel exerts a constant friction force of 0.031 1 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?
---------- m/s
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