A rigid, vertical rod of negligible mass is connected to the floor by a bolt through its lower end, as shown in the figure(Figure 1). The rod also has a wire connected between its top end and the floor. If a horizontal force F is applied at the midpoint of the rod, find the tension in the wire. Find the horizontal component of force exerted by the bolt on the rod. Find the vertical component of force exerted by the bolt on the rod.

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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?”