# physics chapter 2

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1. Is force needed to change an objects state of mind?
Yes.
2. What is net force?
The combonation of all forces acting on an object.
3. A vector is what?
An arrow that represents the magnitude and direction of a quanity.
4. What is the difference between a vector and scalar quanity?
Vector needs both magnitude and direction where as only needs magnitude and no direction.
5. Give an example of a vector quanity.
Force
6. Give 3 examples of scalar quanity
time, area, and volume.
7. Mechanical Equilibruim is where no physical changes occur
True
8. Define support force
The upward force that balances the weight of an object on a surface.
9. If an object is at rest on a horizontal surface the support force must equal what?
The objects weight.
10. Static equilibruim is when objects are atrest
Yes.
11. objects moving in a straight line at a constant speed are in dynamic equilibruim
yes
12. the sum of two or more vectors
resultant
 Author: emmacatherine ID: 98972 Card Set: physics chapter 2 Updated: 2011-08-30 03:28:47 Tags: Vectors Folders: Description: Physics chapter two test vocab. Show Answers: