motion, speed, velocity and acceleration notes

Motion

SpeedVelocity

Acceleration

VocabularyMotion: A change in positionDepends on reference point

Is the mom moving relative to the dad? Is the mom moving if you were on the side of

the road?

SpeedThe distance an object moves in a certain amount of time

Formula:

Unit for SpeedSince the formula is

Then the unit for speed must be a unit of distance divided by a unit of time.

For example: km/h m/s

SpeedLook familiar?Knowing any of the 2 variables, you can solve for the 3rd.

Calculate Speed If you went to a Rihanna concert in

Boston (100 km away) and it took you 2 hours, what was your average speed?

Use the 5 step method List formula List known and unknown values Plug into formula Show the math Circle your answer WITH THE

CORRECT UNIT!

VelocityHow far an object moves in a

given amount of time AND the direction

+

What was your velocity to the

concert?

Acceleration

A change in speed OR direction

Speeding upSlowing downChanging direction

Graphing Speed

Distance (km)

25 50 50 50 100

Time (min)

20 30 40 50 60

Distance (km)

25 50 75 100

125

Time (min)

20 40 60 80 100

Distance (km)

25 40 55 65 75

Time (min)

5 15 30 45 70

Distance (km)

25 50 75 100

125

Time (min)

25 45 60 70 75

Interpreting GraphsThe shape, or slope, of the

line tells the story!

Interpreting a GraphNow you try! What does each graph tell you?

Tell the Story!What story does the graph tell you as you ride your bike to your friend’s house?