Determine how much time the cannon ball will spend in flight. b. Draw a force diagram for three points during the cannon ball’s flight (1) while it is being shot from the cannon, (2) when it is at its maximum height, and (3) when it is half-way between the maximum height and the mat. c. Determine the horizontal distance from the end of the barrel where you should place the mat so that it will catch the ball.

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Newton’s Third Law of Motion

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?”