MOTION
Scalar
-Scalar: Quantities that are fully described by a magnitude (or numerical value) alone.
-An example of a scalar motion is speed. If a car is going 10 mps than its magnitude is 10. It is described my a numerical value alone. Therefore it is Scalar.
Vector
-Vector: Quantities fully described by magnitude and direction.
-An example is velocity. If a car is moving at 10 mps that is scalar. You must put magnitude and direction for it to be a vector. Therefore, if something is going 10 mps east, it is a vector.
Scalar
-Scalar: Quantities that are fully described by a magnitude (or numerical value) alone.
-An example of a scalar motion is speed. If a car is going 10 mps than its magnitude is 10. It is described my a numerical value alone. Therefore it is Scalar.
Vector
-Vector: Quantities fully described by magnitude and direction.
-An example is velocity. If a car is moving at 10 mps that is scalar. You must put magnitude and direction for it to be a vector. Therefore, if something is going 10 mps east, it is a vector.
Distance
-Distance: The length of a path between two points.
-When an object moves on a straight line, the distance is the length of the line connecting the objects starting point and its ending point.
-The SI unit for measuring distance is Meters (m).
-For Large distances is kilometers (km).
-One kilometer is 1000 meters.
-Distances smaller than a meter are measured in centimeters (cm).
-A centimeter is one hundredth of a meter.
Displacement
-Displacement: The direction from the starting point and the length of a straight line from the starting point to the ending point.
-An example of displacement is a roller coaster. If you measure the whole track, how far you want, that is distance. If you measure The distance from where you started to where you finished, that's displacement.
Frame of Reference
-To describe motion accurately, you must have a frame of reference.
-For example you may find how fast a car is moving based on a street sign, because it is not moving.
-Distance: The length of a path between two points.
-When an object moves on a straight line, the distance is the length of the line connecting the objects starting point and its ending point.
-The SI unit for measuring distance is Meters (m).
-For Large distances is kilometers (km).
-One kilometer is 1000 meters.
-Distances smaller than a meter are measured in centimeters (cm).
-A centimeter is one hundredth of a meter.
Displacement
-Displacement: The direction from the starting point and the length of a straight line from the starting point to the ending point.
-An example of displacement is a roller coaster. If you measure the whole track, how far you want, that is distance. If you measure The distance from where you started to where you finished, that's displacement.
Frame of Reference
-To describe motion accurately, you must have a frame of reference.
-For example you may find how fast a car is moving based on a street sign, because it is not moving.
Speed
-Speed: The ratio of the distance an object moves to the amount of time the object moves.
-The SI unit for speed is meters per second (m/s)
-The two ways to describe speed are average speed and instantaneous speed.
-Average speed: The total distance traveled, divided by the time it took.
-Instantaneous speed: The rate at which an object is moving at any given moment.
Velocity
-Velocity: The speed and direction in which an object is moving.
-Velocity is a vector.
-Speed: The ratio of the distance an object moves to the amount of time the object moves.
-The SI unit for speed is meters per second (m/s)
-The two ways to describe speed are average speed and instantaneous speed.
-Average speed: The total distance traveled, divided by the time it took.
-Instantaneous speed: The rate at which an object is moving at any given moment.
Velocity
-Velocity: The speed and direction in which an object is moving.
-Velocity is a vector.
Acceleration
-Acceleration: The rate in which velocity changes.
-Acceleration can be described as changes in speed, direction, or both.
-Acceleration is a vector.
-You calculate acceleration by dividing the change in velocity by total time.
-Acceleration: The rate in which velocity changes.
-Acceleration can be described as changes in speed, direction, or both.
-Acceleration is a vector.
-You calculate acceleration by dividing the change in velocity by total time.
Graphs
-Speed-Time Graph: Constant acceleration.
- The slope of the line is the acceleration.
-Speed-Time Graph: Constant acceleration.
- The slope of the line is the acceleration.
-Distance-Time Graph: Acceleration motion.
Questions
1. What is an example of scalar motion? (see student solutions)
2. What is distance? (see student solutions)
3. One kilometer is ______ meters.
4. The SI unit for speed is _________.
1. What is an example of scalar motion? (see student solutions)
2. What is distance? (see student solutions)
3. One kilometer is ______ meters.
4. The SI unit for speed is _________.
The light bulb application is Distance and Displacement. Every time we go somewhere we go a certain distance. But every time we return home, that is our displacement. Which is zero.