Vocab
Section 11.1
Motion
Section 11.2
Speed and velocity
Section 11.3
Acceleration
Random
100

The length of the path between two points.

Distance

100

What two things do you need to state to describe motion?

•the direction the object is moving

•how fast the object is moving

100

What is the formula for distance?

Distance = Speed x Time
100

What is acceleration?

the rate at which velocity changes.

100

Can acceleration be negative?

Yes

200

The ratio of the distance an object moves to the amount of time the object moves.

Speed

200

What is the difference between Distance and Displacement?

Distance is the length of the path between two points.

Displacement is the length of a straight line between two points.

200

What is the SI Unit for Speed?

meters/second (m/s)

200

A horse on a  carousel is traveling at a constant speed, is it accelerating?

Yes, because it is constantly changing direction

200

On a distance versus time graph, what does a horizontal line represent?

There is no movement

300

The rate at which velocity changes.

Acceleration

300

What is the SI Unit for measuring distance?

meter (m)

300

What are the two ways to express speed?

average speed and instantaneous speed

300

What is the acceleration of any object due to Earth's gravity?

9.8m/s2

300

A person walks 3 blocks south, 2 blocks east, 5 blocks north, and finally 2 blocks west.

What is the distance traveled?

What is the person’s displacement?

The distance traveled was 12 blocks.

The displacement was 2 blocks north.

400

Movement in relation to a frame of reference.

Relative motion

400

What is a vector?

a quantity that has magnitude and direction.

400

What type of speed does a speedometer show?

instantaneous speed

400

What is the formula for calculating acceleration?

(vf-vi)/t

400

What is a frame of reference?

a system of objects that are not moving with respect to one another.

500

The movement of an object toward Earth because of gravity.

Free fall

500

Two vectors that have different directions may be combined how?

They may be combined by graphing.

500

If an objects direction changes, does the velocity change? Why or why not?

Yes, because velocity is the speed and direction of an object so if the direction changes the velocity changes.
500

A ball rolls down a ramp, starting from rest. After 2 seconds, its velocity is 6 meters per second. What is the acceleration of the ball?

3m/s2

500

Bus A travels 300 m in 12 seconds.

Bus B travels 200 m in 12 seconds.

Both vehicles travel at a constant speed.

How do the distance-time graphs for these two buses differ?

Bus A will have a steeper slope because it went a farther distance in the same time.

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