Written Question #1 Three blocks are stacked atop each other. The top block A is

Question

Written Question #1 Three blocks are stacked atop each other. The top block A is attached to the wall using a string. Bob-the-physic-student is pulling to the right on the middle block B with a force P, but due to static friction each block stays at rest. For both the tension exerted on A and Bob's pulling force P, list (i.) the reaction to that force, and (ii.) the forces that cancel it and allows the blocks to stay at rest. For full points, you must explain how you determined your answer. You may assume that P is larger in size than the amount of static friction between A and B

Explanation / Answer

Answer for Question -1 :

Given, P is the pulling applied force which acting horizontally.

(i) Each block is at rest even after applying the pulling force. It means that the static frictional and tension force are balancing the applied forces.

So the reaction forces for the pulling force P,

(ii) The forces cancel the pulling force P, and allows the blocks to stay at rest:

Note. : All the normal and gravitaional forces, acting among the three blocks will cancel each other.

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