In the figure below, the light, taut, unstretchable cord B joins block 1 and the larger-mass block 2. Cord A exerts 2 (a) How does the magnitude of the force exerted by cord A on block 1 compare with the magnitude of the force exerted by cord B on block 2? Is It larger, smaller, or equal? O equal O smaller O larger (b) How does the acceleration of block 1 compare with the acceleration (if any) of block 2? O smaller O larger

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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?”