Two objects are at rest on a frictionless surface. Object 1 has a greater mass than object 2. (a) When a constant force is applied to object 1, it accelerates through a distance d in a straight line. The force is removed from object 1 and is applied to object 2. At the moment when object 2 has accelerated through the same distance d, which statements are true? (Select all that apply.) p1 < p2, p1 = p2, K1 > K2, p1 > p2, K1 = K2, K1 < K2   (b)When a force is applied to object 1, it accelerates for a time interval Δt. The force is removed from object 1 and is applied to object 2. Which statements are true after object 2 has accelerated for the same time interval Δt? (Select all that apply.) K1 > K2, p1 < p2, K1 < K2, p1 > p2, p1 = p2, K1 = K2

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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?”