Two bodies P and Q on a smooth horizontal surface are connected by a light cord. The mass of P is greater than that of Q. A horizontal force (of magnitude F) is applied to Q as shown in the figure, accelerating the bodies to the right. The magnitude of the force exerted by the connecting cord on body P will be A) zero. B) less than F but not zero. C) equal to F. D) greater than F.

Question

Quizplus · Accepted Answer

As the force F acts only on body Q, it will accelerate to the right. Since P is connected to Q by a light cord, it will also accelerate to the right. However, the tension in the cord will be less than F because the mass of P is greater than that of Q. Therefore, the correct answer is B, less than F but not zero.

Two Bodies P and Q on a Smooth Horizontal Surface