Suppose you are sitting in a car at a red light when a car moving toward the north begins to pass you. If you use the passing car as a reference point, the direction in which you appear to be moving is toward the_______
Question 8
8.
The basic SI unit of length is the_______ .
Question 9
9.
If two lines appear on the same motion graph, the line with the steeper _______ indicates a greater speed.
Question 10
10.
A _______ is a place or object used for comparison to determine if something is in motion.
Question 11
11.
_______ is the length of the path between two points.
Question 12
12.
Question 13
13.
Question 14
14.
Question 15
15.
Question 16
16.
Question 17
17.
Question 18
18.
What two variables are plotted on the graph?
Question 19
19.
How far did Kathy jog in the first 4 minutes?
_______ m.
Question 20
20.
Explain how to find the average speed of a car that travels 300 kilometers in 6 hours. Then find the average speed.
Question 21
21.
Suppose you are on a train. List 1 object that make good reference points to determine whether or not the train is moving,
Speed equals distance divided by
time
velocity
size
When you know both the speed and direction of an object’s motion, you know the
average speed of the object.
instantaneous speed of the object.
velocity of the object
Which of the following is the SI unit for speed ?
m/s
m/s2
s2/m
Two objects traveling at the same speed have different velocities if they:
start at different times
have different masses
move in different directions
The International System of Units is used by scientists
only in the United States.
only in France.
all over the world
If you know a car traveled 300 kilometers in 3 hours, you can find its
acceleration
average speed
velocity
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.
True
False
Speed in a given direction is called velocity.
True
False
Most objects do not travel at a constant speed.
True
False
Motion is measured relative to a reference point.
True
False
Average speed is the rate at which an object is moving at a given instant.
True
False
A straight diagonal line on a distance-versus-time graph indicates constant speed.