Nov. 6, 2017 You need: Clean paper / pencil Motion notes 3rd pd: HW vocabulary 4x4 Warm Up for exchange Warm Up: 4,152 cm = ______________ dkm Explain your process. I CAN: measure distance and time to calculate speed. I CAN: illustrate speed patterns through graphs. Today we review metrics quickly – and then go back to MOTION. On Friday we did a little “inquiry” about spheres – and how to describe them. The goal was to work on truly describing the motion – and then whittling it down to description of the motion.

Practice these together 1.) 103 km = __________ dm 2.) 00.996 hm = __________ km 3.) 65.8 mm = _______ cm

Practice these on your own (show the decimal movement) 1.) 10 Dkm = ________ dm 2.) 2.94 Hm = ________ cm 3.) 51.73 m = ________ km 4.) 0.232 km = _______ m 5.) 00.0318 km = _________ mm 6.) 0.422 Dkm = __________ mm 7.) 98 dm = ________ Dkm 8.) 325 mm = __________ cm

Metrics Consistent words…METER, LITER, GRAM How big is a meter?

Conversion in the METRIC system… NAME! RIGHT Kilo Hecto km Deka hm dkm deci LEFT centi Meter Liter Gram dm milli cm mm

How can we describe motion? Motion can be described by: DISTANCE (how far did it travel?) TIME (how long did it travel?) SPEED (how fast did it travel?) DIRECTION (which way did it go?) ACCELERATION (does the motion change?)

The binder clip will be set at 10 cm – so the ramp is at 10 cm. An index card to indicate the movement. Binder clip – to steady the ramp To mark a place for the ramp AND a start for the index card. End point – to be measured for distance.

What did you observe? What did you measure? What happens if you change the ramp?

How can we describe motion? Motion can be described by: DISTANCE (how far did it travel?) TIME (how long did it travel?) SPEED (how fast did it travel?) DIRECTION (which way did it go?) ACCELERATION (does the motion change?)

In math terms… Distance Speed = Time A “change in position over time” is the same as saying: Distance Speed = Time

Speed = d Distance Time s t

D S T Speed = Distance Time Time = Distance Speed Distance = Speed x Time D S T

Let’s practice calculating speed If you travel 100 km in 2 hours, what is your speed? Speed = Distance Time Distance = 100 km Time = 2 hours Speed = 100 km 2 h Speed = 50 km/h

Speed Practice Problems A family takes a car trip heading northeast from Durham, NC to Washington, DC. They travel for 4 hours and cover 360 km. What was their average speed? Speed = Distance Time = 360 km 4 h = 90 km/h

Speed vs. Velocity SPEED – tells you have fast or slow something is moving (changing position). Example = 25 km/h VELOCITY – tells you speed AND DIRECTION! (changing position in a certain direction) Example = 25 km/h EAST

Speed Practice Problems A family takes a car trip heading northeast from Durham, NC to Washington, DC. Their speed was 90 km/h. What was their VELOCITY? Velocity is SPEED and DIRECTION! Velocity = 90 km/h NORTHEAST

What was the average speed of the runner in the first 5 seconds of the race? Speed = 25 m 5 s Speed = 5 m/s

SLOW MOVEMENT

FAST MOVEMENT

FAST vs. SLOW FAST SLOW

Starting & Stopping

No Motion

Speeding Up Slowing down

Motion Foldable Motion Review Label the bottom of each flap as shown. Draw / decorate your top flap with the foldable’s title. By John Smith

Motion Foldable 4. Repeat for constant motion, different speeds (draw two lines on the same graph), and acceleration (speeding up and slowing down). 3. For “No motion,” label the graph axes and draw in the line that would result from a STOPPED object. Describe it in words.

Check your work! Acceleration Different Speeds Constant Motion

Motion Foldable 4. Write in the formula for speed and some example units. 5. Write in the definition for velocity and one example. distance time Speed = Example units: m/s, Km/h Velocity: Speed + Direction (ex. 25 m/s East).

Motion Foldable 6. Write in the formula for acceleration and some example units. 7. Write down the three ways that an object can accelerate. distance time Speed = Example units: m/s, Km/h Velocity: Speed + Direction (ex. 25 m/s East). Acc. = Final speed – Start speed Time Example units: m/s2, Km/h2 Objects accelerate by: Speeding up Slowing down Changing direction