Question

A stonemason drags a marble block across a floor by pulling on a rope attached to the block as illustrated in the figure. The block is not necessarily in equilibrium. According to Newton's 3rd law, which case of the following isn't considered an action-reaction pair? 200- 46.02.2 A) Force of rope on block - Force of block on rope B) Force of block on ground - Force of ground on block C) Force of mason on rope - Force of rope on mason D) Force of block on rope - Force of mason on rope

Answer 1

If a stonemason drags a marble block across a floor by pulling on a rope attached to the block, all actions except the Force of the block on a rope and the force of the mason on the rope are considered action-reaction pairs according to Newton's third law of motion. The correct option is D) Force of block on rope - Force of mason on rope.

Step-by-step explanation:

According to Newton's third law of motion, for every action force, there is an equal and opposite reaction force. In the given options, all except option D are considered action-reaction pairs. Option D, which is 'Force of block on rope - Force of mason on rope', is not considered an action-reaction pair.

The force of the block on the rope and the force of the rope on the block form an action-reaction pair, but the force of the mason on the rope does not have an equal and opposite reaction force. Hence, D is the correct option.