Chapter6 Studyguide
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 accelerating. |
The basic SI unit of length is the
| a. | meter. |
| b. | foot. |
| c. | inch. |
| d. | mile. |
Speed equals distance divided by
| a. | time. |
| b. | velocity. |
| c. | size. |
| d. | motion. |
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. |
You can show the motion of an object on a line graph in which you plot distance against
| a. | velocity. |
| b. | time. |
| c. | speed. |
| d. | direction. |
The steepness of a line on a graph is called the
| a. | rise. |
| b. | run. |
| c. | slope. |
| d. | the vertical axis. |
The rate at which velocity changes is called
| a. | instantaneous speed. |
| b. | direction. |
| c. | acceleration. |
| d. | motion. |
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 flight path |
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. |
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. |
A place or object used for comparison to determine if something is in motion is called
| a. | a position. |
| b. | a reference point. |
| c. | a constant. |
| d. | velocity. |
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. |
If you know the distance an object has traveled in a certain amount of time, you can determine
| a. | the size of the object. |
| b. | the speed of the object. |
| c. | the location of the object. |
| d. | the acceleration of the object. |
It is rare for any motion to
| a. | stay the same for very long. |
| b. | change quickly. |
| c. | increase in velocity. |
| d. | decrease in speed. |
If the speed of an object does NOT change, the object is traveling at a
| a. | constant speed. |
| b. | average speed. |
| c. | increasing speed. |
| d. | decreasing speed. |
Changing direction is an example of a kind of
| a. | acceleration. |
| b. | speed. |
| c. | velocity. |
| d. | constant rate. |
If 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. |
If you know a car traveled 300 kilometers in 3 hours, you can find its
| a. | acceleration. |
| b. | direction. |
| c. | average speed. |
| d. | velocity. |
In an acceleration graph showing speed versus time, a straight line shows the acceleration is
| a. | decreasing. |
| b. | increasing. |
| c. | changing. |
| d. | constant. |
What kind of line on a distance-versus-time graph indicates that the object is accelerating?
| a. | curved |
| b. | horizontal |
| c. | diagonal |
| d. | vertical |
A classroom measures 4.33 meters wide. How wide is the classroom in centimeters?
| a. | 0.433 cm |
| b. | 43.3 cm |
| c. | 433 cm |
| d. | 4,330 cm |
Kilo- is a prefix that means
| a. | one thousandth |
| b. | one hundredth |
| c. | one hundred |
| d. | one thousand |
A runner rounding a curve on a track at a constant speed is an example of what type of acceleration?
| a. | changing direction |
| b. | decreasing velocity |
| c. | increasing velocity |
| d. | instantaneous speed |
Motion is measured relative to a reference point. _________________________
Average speed is the rate at which an object is moving at a given instant. _________________________
If a toy car traveling at 10 cm/s passes a toy car moving at 10 cm/s in the opposite direction, both cars have the same velocity. _________________________
A straight diagonal line on a distance-versus-time graph indicates constant speed. _________________________
A horizontal line on a distance-versus-time graph means that the object is at rest. _________________________
A child riding on a merry-go-round is accelerating because his direction is changing. _________________________
A straight line on a graph of speed-versus-time means that the object has a constant acceleration. _________________________
A reference point is assumed to be ____________________, or not moving.
A change in an object’s position relative to a reference point is called ____________________.
The distance traveled by a moving object per unit of time is called ____________________.
Speed that does not change is referred to as ____________________ speed.
The statement that the motion of a hurricane is 20 kilometers per hour in an easterly direction is a description of the hurricane’s ____________________.
Acceleration is the rate of change in ____________________.
____________________ occurs when an object slows down.
The motion of a car stopping at a traffic light is an example of a(n) ____________________ acceleration, also called deceleration.
If a car is speeding up, its initial speed is ____________________ than its final speed.
The prefix centi- means one ___________________.
