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Physical Science
WAS Chapter 4
| Question | Answer |
|---|---|
| What is the study of motion called | Mechanics |
| What is the description of HOW things move | Kinematics |
| What is the description of what CAUSES movement | Dynamics |
| What is the description of how STATIONARY things react to pushes and pulls | Statics |
| What is being studied that is inside a boundary. It can be anything. | System (physical system) |
| What is everything outside the boundary of the system. | Surrounding |
| Scientists are interested in how our .......... affect the system | Surroundings |
| When we observe movement, how we see it depends on this. We need landmarks to anchor our observations. This will determine how we describe motion. No single reference point is more correct than this. | Frame of reference |
| THis is an imaginary line marked off in distance. The origin of this has a value of zero (x=0), is palces at the point of reference. This is parallel to the motion. | THe coordinate axis |
| IT can be horizontal, vertical or even slanted | The coordinate axis |
| Calculations are easier if the movement of the coordinate axis is in what direction | positive |
| This is a nonphysical contimuum that orders the sequence of events and phenomena. The unit is in seconds | Time intervals |
| This means the change in time and should always be POSITIVE | Delta t (triange+t) |
| This means final time, when you end | t sub f |
| THis means initial time, when you begin | t sub i |
| The formula for time interval | Delta t= t sub f - t sub i |
| These include direction, can be positive or negative. examples are velocity and acceleration | Vector quantities |
| These do not include direction. an example is distance | Scalar quantities |
| This occurs when a system's position changes during a time interval | Motion |
| Indicate postion by using this | X |
| Your change in position is calculated by using this formula | Delta x = x sub f - x sub i |
| This is calculated by adding up the entire route you took. IT'S NEVER NEGATIVE. | Distance |
| This has NO direction, just magnitude (how big it is) | Scalar |
| THis is calculated by seeing the change in where you are, versus where you started | Displacement |
| This IS direction (left, right, up, down, all indicated with a + or - sign) AND magnitude | Vector |
| This reflects how far you moved, if you moved at all. It is ALWAYS positive | Magnitude |
| This is the rate of motion | Speed |
| This is equal to the total distance / time | Speed |
| Formula for the AVERAGE speed for that time | Speed (s) = d / delta t |
| What is the rate of displacement. It can be positive or negative. The sign just tells you which way you are going. | Velocity |
| What is the formula for velocity | Velocity (v) = delta x / delta t |
| This is the change in speed or velocity over time | Acceleration (a) |
| If a formula contains a vector, velocity, in the formula, the formula is a..... | Vector |
| Formula for acceleration for change in speed over change in time | a = delta s / delta t |
| Formula for acceleration for change in velocity over change in time | a = delta v / delta t |
| What type of motion is back and forth, up and down | One dimensional motion |
| What type of motion uses a coordinate plane (x,y graph) | Two dimensional motion |
Created by:
dmaks
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