Question

InFIGURE Q5.4, block B is falling and dragging block A across a table. How many force vectors would be shown on a free-body diagram of block A? Name them

Short answer

The upward normal force, left kinetic frication, right tension, and downward gravity are depicted in the free body diagram.

Step-by-step solution

Given information

Given Figure :

Determining how many force vectors would be shown on a free-body diagram  

If we have an object that is being acted upon by forces, we must be able to detect those forces. The technique for recognizing forces will be depicted in visual form, as seen in the picture below.

The following steps are taken to determine the forces:

1. We recognize the item, which is block A, which is accelerating due to block B's stress.

2. As shown in the diagram, we make a graphic for the block.

3. We draw a closed circle or a curve around the object, as indicated in the figure below by the dashed curve.

4. We name and label the object's contact forces, which are the normal force, tension force, and kinetic friction exerted by the earth in this example.

5. We name the long-range forces, which are the only ones in this situation.

As a result, we can determine the forces acting on the block using the diagram, where the forces are the normal force $n$, which acts upward, the kinetic friction $f$, which acts in the opposite direction of the plane's motion, the tension $T$, which acts in the same direction as the motion, and the gravitational force, or the block's weight, which acts downward due to the block's weight.