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Ch 3
Question | Answer |
---|---|
What is a scalar? | a quantity completely specified by only a number with appropriate units; has magnitude, but no direction |
What is a vector? | a quantity that has magnitude and direction. |
What are examples of scalars? | speed, volume, and the number of pages |
What are examples of vectors? | displacement, velocity, acceleration, |
(Vector)X(Scalar)= | Vector |
V = | Velocity |
2V = | Double velocity |
-2V= | Double velocity & go 180 degrees |
What is projectile motion? | Motion of an object in 2 dimensions that is under the influence of gravity and no other influence |
What kind of path does projectile motion follow? | Parabola |
What is a frame of reference? | Coordinate system for describing precise locations of objects from space |