Force Puzzles

In each of the problems below, you are given a force diagram for an object. Draw a situation that could produce that force diagram.

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   In the problems below, free body diagrams are shown for a number of objects that somehow interact with each other. Reconstruct the scene by using Newton's third law.
   
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5. 
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
6.