A pitcher throws a 105 g baseball horizontally starting the ball at rest. His hand moves horizontally wi the ball a distance of 134 cm before releasing the ball, which reaches a speed of 46 m / s. How much force did the pitcher apply to the ball? Note: We assume that the value of the force applied by the pitcher on the ball is constant. a) F =1.8022 N. b) F = 82.903 N. c) F =111.09 N. d) F = 829.0299 N.

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The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”