# Physical Science Ch 9 Motion

12 Questions | Total Attempts: 2548  Settings  This is a quiz on Chapter Nine Motion with an emphasis on Describing and Measuring Motion, Speed and Velocity and Acceleration.

• 1.
When an object's distance from another object is changing.
• A.

It is in motion

• B.

It is speeding

• C.

It has a high velocity

• D.

It is acceleration

• 2.
Speed equals distance divided by
• A.

Time

• B.

Velocity

• C.

Size

• D.

Motion

• 3.
When you know both the speed and direction of an object's motion, you know the
• A.

Average speed of the object

• B.

Acceleration of the object

• C.

Distance the object has traveled

• D.

Velocity of the object

• 4.
The rate at which velocity changes is called
• A.

Instantaneous speed

• B.

Direction

• C.

Acceleration

• D.

Motion

• 5.
Which of these is an example of deceleration?
• A.

A bird taking off for flight

• B.

A roller coaster moving down a steep hill

• C.

A car approaching a red light

• D.

An airplane following a straight path

• 6.
To determine the acceleration rate of an object, you must calculate the change in speed during each unit of
• A.

Velocity

• B.

Time

• C.

Motion

• D.

Deceleration

• 7.
Average speed is
• A.

Equivalent to velocity

• B.

The rate at which an object is moving at a given instant

• C.

The rate at which a slope changes

• D.

The total distance traveled divided by the total time

• 8.
A place or oject used for comparison to determine if something is in motion is called
• A.

A position

• B.

A reference point

• C.

A constant

• D.

Velocity

• 9.
On a graph showing distance versus time, a horizontal line represents an object that is
• A.

Moving at a constant speed

• B.

Increasing its speed

• C.

Decreasing its speed

• D.

Not moving at all

• 10.
Changing direction is an example of a kind of
• A.

Acceleration

• B.

Speed

• C.

Velocity

• D.

Constant rate

• 11.
A bicyclist travels 30 kilometers in two hours, her average speed is
• A.

30 km/h

• B.

60 km/h

• C.

15 km/h

• D.

2 km/h

• 12.
In an acceleration graph showing speed versus time, a straight line shows the acceleration is
• A.

Decreasing

• B.

Increasing

• C.

Changing

• D.

Constant

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