Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
BJU Physical Science
Chapter 4
| Question | Answer |
|---|---|
| mechanics | the scientific study of forces and motion, which consists of kinetics, dynamics, and statics |
| kinematics | The science of describing how things move. |
| dynamics | the study of how forces affect an objects motion |
| statics | the description of how stationary objects react to pushes and pulls |
| system | part of the universe under study separated from its surroundings by an actual of imaginary boundry. |
| surroundings | everything outside a systems boundary |
| frame of reference | the geometric space containing the reference point and coordinate axes from which a person observes or measures position and movement |
| coordinate axis | an imaginary line that contains a origin as a point of reference and is marked off in distance units |
| interval | a span of time during which a phenomenon is observed calculated by subtracting the initial time from the final time. |
| scalar | any measurable quantity represented by an italicized symbol the can be completely described by a single piece of information. |
| vector | a measurable quantity, represented by a bold symbol, that requires two pieces of information to fully describe it |
| distance | a positive scalar quantity representing the linear dimension a moving covers during a time interval. |
| displacement | a quantity that describes the net distance and direction of motion. it is always a vextor quantity and is represented graphically by a vector arrow whose tail is at the starting point of motion and whose tip is at the ending point. |
| magnitude | the size of any quantity expressed as a positive number in appropriate units. the length or size of a vector is its magnitude |
| speed | the rate of motion of a system. it may also be the magnitude of velocity. it is always a scalar quantity. |
| average speed | the average rate of motion overa time interval that accounts for varitations in speed. it is positive scalar quantity |
| velocity | the rate of change of the speed or velocity of a system during a time interval. it may be a vector or scalar quantity. |
| instantaneous speed | actual speed at any instant. |
Created by:
StacyC
Popular Physical Science sets