Chapter 8-motion Flashcards
Scalers
Describes the magnitude but the the direction
Vectors
Describe the magnitude and the direction
Distance
(d)
Scaler quantity
- the length of the path between to points
Measured in metres
Position
- > (d)
Vector
Describes a specific point relative to a reference point, describes an objects location seen from and observer point to view
Eg. A car drive to the store 10m east
Displacement
Ad
Vector
Describes the straight line distance and direction from one point to another( how much position has changed)
Ad= df-di
Time and time interval
Time= (t) Interval At It describes motion Scaler Seconds and hours At= tf-ti
Pos and neg vectors
\+= N, E, right, up -= S, W, down, left
Position time graph
Shows how an objects position changes over time allowing its motion to be analyzed Line slopped up= pos Slopped down= neg Horizontal= not moving at rest Straight line means uniform motion
Uniform motion
Objects in uniform motion travel equal displacements in equal time intervals
Objects do not speed up or slow down or change direction
Constant rate of change
Reference point
It is the position it started in which is where the change in measured
Average velocity
->
V
Is vector that describes how quickly and object changes position and direction of change
In meters per second or km/h
Vav=Ad
AtSpeed
Is a scaler quantity that measures the magnitude of velocity
Objects traveling at the same speed can have different velocities
Like and escalator
Or chair lift
Slope
Your average velocity
Slope = displacement Ad
Interval time At
Or
Df-di
Tf-tiConverting measurements and time
Convert km to m (1km=1000m)
Convert hrs to s (1 hr= 3600s)
Eg. 55km/h
55x1000/3600= 15m/s
Magnitude
Refers to the size of the measurement or the amount number you are counting
Used in- speed, time, distance
