# Physics Midterm

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 Author: yellowfreak516 ID: 58512 Filename: Physics Midterm Updated: 2011-01-07 00:59:59 Tags: physics Folders: Description: Vocabulary Show Answers:

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1. a simple physical quantity that is not changed by coordinate direction
SCALAR
2. a straight line segment whose length is magnitude and whose orientation in space is direction
VECTOR
3. a physical length
DISTANCE
4. shortest distance from the initial and final positions
DISPLACEMENT
5. distance travelled per unit time
SPEED
6. rate of change of position (m/s)
VELOCITY
7. change in velocity over time
ACCELERATION
8. The speed of an object at one instant of time
INSTANTANEOUS SPEED
9. The overall rate of speed at which an object moves
AVERAGE SPEED

10. vertical motion of an object falling a small distance close to the surface
FREE FALL
11. the tendency of a body to maintain its state of rest or uniform motion unless acted upon by an external force
INERTIA
12. push or pull
FORCE
13. force between two objects (or an object and a surface) that are in contact with each other
CONTACT FORCE
14. interaction of two objects which are separated in space with no known mediator of the interaction
ACTION AT A DISTANCE
15. force resisting the relative lateral (tangential) motion
FRICTIONAL COEFFICIENT
16. a vector that is the sum of two or more other vectors
RESULTANT

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