The two blocks are connected by a massless uniform rope. An upward force of 150 N is applied as shown in the figure below. (a) Draw three free-body diagrams: one for the 6.00-kg block, and another one for the 5.00-kg block. For each force, indicate what body exerts that force. b) What is the acceleration of the 5.00-kg block? c) What is the tension at the top of the 5.00-kg block?

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Q: velocity

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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?”