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Speed and Velocity
Acceleration
Displacement During Acceleration
Interpreting Graphs
100

What are the definitions for scalars and vectors?

Scalars: have only one quantity

Vectors: have more than one quantity (magnitude and direction)

100
What are the formulas for speed and velocity?

speed = distance/time

velocity = displacement over time

100
An car at rests accelerates to 40km/hr [S] in 8.0 seconds. What formula would use to find the acceleration of the car?

acceleration = change in velocity/change in time

100

If vi is equal to 0, what two formulas can we use to find displacement during accelerated motion?

d=(vf/2)t

d=(1/2)a(t)2

100

What is the formula for the slope of a graph?

slope = rise/run 

or

slope = (y2-y1)/(x2-x1)

200

Give a real life example where it is important to know displacement during accelerated motion. 

E.g. Merging lanes, traffic lights, etc. (answers may vary)

200
A jogger runs for 30 minutes and has a displacement of 3.21 km [N]. What was their average speed and velocity in m/s?

Speed: 1.9 m/s

Displacement: 1.9 m/s [N]

200
Why are the units for acceleration m/s2?

Acceleration = velocity/time

velocity/time = (m/s)/s = m/(s x s) = m/s2

200

A spacecraft accelerates at a constant rate of 6.9 m/s2 [up] for 46.0s. How far will the spacecraft travel during this time?

7.3 x 103 m [up]

200

What does the slope of this graph represent? 

(See drawing #1 on board)


Speed

300
What was the name of Ms. Carlson's dog?

Sadie

300

What is another way or writing -6.0 m/s [L]?

(HINT: Think about the directions)

6.0 m/s2 [R]

300

A dog is happily walking in the yard at 0.7 m/s [W] when they all of a sudden see a bird and start running towards it, reaching 4.9 m/s [W] in 2.00 seconds. What was the dog's acceleration?

2.1 m/s2 [W]

300

What is the acceleration of a boat that had a displacement of 79.0 m [W] and travelled for 47 seconds? 

7.1 m/s2 [W]
300

What kind of motion is occurring in this graph?

(See drawing #2 on the board)

Non-uniform accelerated motion

400
What would this number look like in correct scientific notation with 3 significant digits?

24.56

2.46 x 101

400

A race car goes completely around a 1.7km oval racetrack in 22 seconds. What is the speed of the car? What is it's velocity?

Speed: 77 m/s

Velocity: 0 m/s

400

A car is driving at 55 km/h [E] when they have to stop suddenly for a red light. The car comes to a stop in 6.2 seconds. What was the acceleration of the car?

-2.5 m/s [E]

or

2.5 m/s[W]

400

How long did it take for a tractor to travel across a field that was 2.9 km in length while going 2.8 m/s [E]?

46 seconds

400

Is the motion in both of these graphs the same or different? What kind of motion is it?

(See drawing #3 on the board)

Yes. It is uniform velocity. 

500

Is mass a scalar or vector quantity?

Scalar
500

A bird flies 15 m [S] in 8.0 seconds, 34 m [N] in 29 seconds, and then 62 m [S] in 55 seconds. What was the bird's velocity?

4.7 x 10-1 m/s [S]

500

An individual is riding their bike at 15.2 m/s [S] and accelerates by 1.8 m/s [S] over 7.0 seconds. What is the final velocity of the bike?

28 m/s [S]

500

An individual has an initial velocity of 1.7 m/s [R] and travels at that velocity for 3.45 minutes. They then accelerate at 0.21 m/s2 [R] for 5.91 seconds. What was their total displacement?

6.3 x 102 m [R]

500

What type of motion is occurring at A, B, C, and D?

(See drawing #4 on the board)

A: Acceleration

B: Uniform Velocity 

C: Deceleration

D: No velocity (stopped)