A toy cannon uses a spring to project a 5 40 g soft rubber ball...

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A toy cannon uses a spring to project a 5 40 g soft rubber ball The spring is originally compressed by 4 91 cm and has a force constant of 7 95 N m When the cannon is fired the ball moves 14 1 cm through the horizontal barrel of the cannon and the barrel exerts a constant friction force of 0 031 0 N on the ball a With what speed does the projectile leave the barrel of the cannon 1 389 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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