A 67 kg circus gymnast is suspended in the air by two ribbons which are tied to the ceiling above him. The two ribbons make an angle of 48 degrees with respect to the ceiling. Assume gymnast is at rest. a. What is the magnitude of the tension force in each of the ropes? b. What is the reaction force associated with the gymnast’s weight? c. If the gymnast suddenly lets go of one of the ropes, what will be the horizontal component of his acceleration just after letting go?

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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?”