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Force Diagram Basics (Grades 11-12)

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Force Diagram Basics

Instructions: Read each question carefully. Choose the answer that best fits the question. Short answer response questions must be responded to in complete sentences. If the question involves calculations, you must show all your math work.

1. 
Which forces are drawn on a free-body diagram of an object?
  1. only those forces that are exerted by the object
  2. all forces exerted on the object and by the object
  3. only those forces that are exerted on the object
  4. only the sum of the forces exerted on and by the object
2. 
What are normal forces?



3. 
Correctly match the free body diagram to the scenario it might represent.

A.Free Body Diagrams 1B.Free Body Diagrams 2
C.Free Body Diagrams 3D.Free Body Diagrams 4
A. 
A surf boarder, on his surfboard, is coasting to the right sliding into a sandy beach.          
B. 
A motorcycle is driving at a constant velocity down the highway.          
C. 
A dog is pulling on his leash, dragging his small owner across the porch.          
D. 
A bowl of tomatoes is resting on the kitchen counter.          
4. 
The concept of the "normal" force is based on Newton's              Law of Motion.
5. 
What is static equilibrium?



6. 
Which of these is true for a body in mechanical equilibrium?
  1. The vector sum of all external forces is zero.
  2. The sum of the moments of all external forces about any line is zero.
  3. Both of the above.
7. 
If the [math]F_"net"[/math] acting on an already moving object is equal to zero, the object is said to be in a state of                                             .
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