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3 ways to describe motion

- Words
- Equations
- Graphs

Scalar

a measurement that has only magnitide and units

Magnitude

how much the numerical value is without positive or negative reference

Direction

the angle an object is being moved in

Vector

a measurement that has both magnitude and direction

Distance

a measurement of the path traveled (scalar)

Displacement

- a measurement of difference in position, it needs no reference points, just the difference in two position points
- vector

Position-Time Graphs

- a tool for showing where an object is located at a precise point in time
- slope is equal to the velocity
- positive slope-object is moving forward
- negative slope-object is moving backwards

Average Velocity

- to find the average velocity, the slope of the line is found between the two points (t1,d1) and (t2, d2)
- average velocity= (d2-d1)/(t2-t1)
- is NOT a mathematical average of all the velocities traveled

Instantaneous Velocity

- how fast the object is going at a particular point n time
- it can vary from the average

Constant Velocity

- when an objects speed or direction does not change as time progresses
- straight line-path with no acceleration

Speed

- the distance traveled in a given amount of time of the event divided by the time of the event
- speed= distance\time
- Scalar
- unites are meters per second

Velocity

- the displacement for a given time period for an event to occur divided by the time of the event
- velocity= displacement/time
- vector
- unites are meters per second with a direction

Reference Point

the zero point, or the orgin

Frame of Reference

the coordinate system, what is considered to be stationary

Position

measure from the reference point

Average Speed

- the entire distance covered by the total travel time
- doesn't indicate various instantanous speeds along the way
- average speed= total distance covered/ travel time

Instantaneous Speed

- the speed at any instant in time
- the slope of a line or curve at any point in time

Constant Speed

a steady speed, not speeding up or slowing down

Acceleration

- rate at which velocity changes over time
- involves change in speed, change in direction, or a change in both
- acceleration=change in velocity/time interval
- a vector
- units: m/s
^{2}

About this deck

Author: Lauren C.

Created: 2011-09-05

Updated: 2011-09-05

Size: 20 flashcards

Keywords: flash card flashcards digital flashcards note sharing notes textbook wiki college dorm class classroom exam homework test quiz university college education learn student teachers tutors share, study blue studyblue studyblu

Views: 6

Created: 2011-09-05

Updated: 2011-09-05

Size: 20 flashcards

Keywords: flash card flashcards digital flashcards note sharing notes textbook wiki college dorm class classroom exam homework test quiz university college education learn student teachers tutors share, study blue studyblue studyblu

Views: 6

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