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Q.18

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 128

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Short Answer

Exercises 18 show two of the three forces acting on an object in equilibrium. Redraw the diagram, showing all three forces. Label the third force .

The net force of should be acting on the object such that the object is at equilibrium.

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Step by Step Solution

Given information:

From the given diagram, one can observe that .

Draw the force diagram with net force:

The net force acting on the given diagram is

F=F1 + F2

Since both the forces are in opposite directions, the net force will be reduced and acting along F1.

It can be seen from the below force diagram:

Draw the force diagram for :

Since the net force is along F1, the third force F3 should act in such a direction to nullify the net force F.

Therefore, the F3 must be acting along F2 as shown in the below force diagram:

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