Speed
Velocity
Acceleration
Motion
Definitions
100

What is the formula for speed?

Speed = Distance / Time

100

What is the formula for velocity?

Velocity = Displacement / Time (must be with a direction)

100
What is the formula for acceleration?
Acceleration = Final Speed - Initial Speed / change in time
100

The definition of motion.

When an object's distance from another object changes.

100

The modern study of motion.

What is mechanics?

200

How is speed different from velocity?

velocity needs a direction

200
What is the velocity of an object that is moving 6 meters in 2 seconds east?
3 m/s east
200
What are three ways we can tell if something is accelerating?
increasing its speed; decreasing its speed; changing direction
200

What you use to determine if something has moved.

Reference Point

200

This branch of mechanics describes how things move.

What is kinematics?

300

What is the average speed of a cow that walks east 60 meters in 120 seconds? (Remember, the units must be m/s or km/hr)

0.5 m/s

300
Distance = 20 meters Time = 4 seconds Direction = south What is the velocity of this object?
5 m/s south
300

Final Velocity = 50 m/s south Initial Velocity = 60 m/s south Time to change velocity = 5 seconds What is the acceleration of this object?

-2 m/s/s, south

300

What must a good reference point do?

Not move

300

Geometric space containing the point of reference.

Frame of reference

400
A porcupine moved toward a pond at a speed of 5 m/s. It took him 8 seconds. What was the distance he traveled?
40 meters
400
An object travels 25 meters in 2 seconds east. What is it's velocity?
12.5 m/s east (must include direction!)
400
How would you describe negative acceleration? You must use the word "speed".
decrease in speed over time
400

If you were walking with a bird on your shoulder, would the bird think you're moving? Explain

No, because since he's "attached to you", from his point of view you're standing still and everything else is moving.

400

Measurable quantity with both magnitude and direction.

What is vector?

500
What is the speed of an object moving east for 6 seconds at 105.3 m/s?
105.3 m/s
500
A pink alien moved south in its spacecraft for 2 km at a rate of 20 m/s. How much time did it take him to do this in seconds?
100 s
500

How would you describe the acceleration of this object? - 14 m/s/s, east

decreasing its speed, decrease in 14 m/s every second

500
Why you feel like you're going BACKWARDS when a semitruck moves past you at a stoplight.
You think the semi is standing still, and since you're seeing further and further back on it, you assume you're the one moving and that you're moving backwards.
500

Speed at given moment in time.

What is instantaneous speed?
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