Two students push on the opposite sides of a crate, with the force applied by each student in newtons (N), as shown in the diagram. 40 N- 53 N Assuming the crate is on a frictionless surface, describe the effect of these forces on the crate. • Will the crate move toward the left, toward the right, or not at all? • What is the direction and the magnitude of the net force on the crate?

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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?”