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Distance & Displacement
Speed & Velocity
Acceleration
Math Review
Random
100

A system of objects that aren't moving with respect to one another is called _____________. 

Frame of Reference

100

The ratio of the distance an object moves to the time the object moves is called:

Speed

100
If something is only accelerating due to gravity, we say that it is in this state. 

Free Fall

100

A bug travels 10 meters in 2 seconds. What is the bug's average speed?

5 m/s

100

What is the SI unit for distance?

Meters (m)

200

If a runner runs around a track, and ends up right where she started, what is the runner's displacement in meters?

0 meters.

200

What is velocity?

A description of both speed and direction. Velocity is a vector. 
200

If something has a negative acceleration, it is: 

Decelerating (slowing down)

200

A car travels at 50 km/h. How many kilometers will the car drive in 1.5 hours?

75 km

200

How do we combine displacements or velocities?

Vector addition

300

What is the difference between distance and displacement?

Displacement is a vector, so it has direction. 

300
In words (not the equation!), how do you calculate the average speed of an object?

The total distance traveled divided by the time it takes to travel that distance. 

300

If the velocity of an object is changing at a steady rate, the acceleration is:

Constant

300

A runner accelerates from rest to 10 m/s in 5 seconds. What is the runner's acceleration?

2 m/s2

300

What is the acceleration of an object that is falling? (just gravity)

9.8 m/s2

400

If a car moves 5m west, then 3m east, what is the car's displacement from its starting point?

2m west

400

What does the slope represent on a distance-time graph?

The speed

400

Acceleration refers to changes in these two things (or both!)

Speed and direction (or both!)
400

A ball rolls down a ramp. After 2 seconds, its velocity is 6m/s. What is the ball's acceleration?

3 m/s2

400

What is the difference between average speed and instantaneous speed?

Average speed is the entire trip, instantaneous speed is at a certain moment. 

500

Movement in relation to a frame of reference is called _____________. 

Relative motion

500

If a car's motion is represented on a distance-time graph, and the line is horizontal, what speed does the car have?

0 (it isn't moving)

500
Describe an example of accelerating without changing speed.

(answers will vary, but will involve changing direction)

500

An object decelerates at a rate of -7 m/s2. If the car starts at 49m/s, how long will it take for the object to come to a complete stop? 

(hint: t=(vf-vi)/a)

7 seconds

500
What does accelerated motion look like on a distance-time graph?

It looks like a curve (it is non-linear)