Name______Class______Date______
Skills Worksheet
Directed Reading B
Section: Measuring Motion
1.Name something in motion that you cannot see moving.
______
Motion AND Reference PointS
_____2.An object in motion is usually seen moving in relation to an object that appears to
a.stay in place.
b.keep moving.
c.maintain constant velocity.
d.maintain constant acceleration.
_____3.When an object changes position over time relative to a reference point, the object is
a.at rest.
b.a feature on Earth’s surface.
c.not moving.
d.in motion.
4.For seeing motion, features on Earth’s surface are often used as standard
______.
5.Name two nonmoving objects that are useful reference points.
______
______
6.What type of object other than nonmoving objects can be used as reference points?
______
7.The motion of an object moving to the right can be described in reference to a two-dimensional grid as a movement in the positive direction on the
______-axis.
AVERAGE SPEED
8.The average speed of an object is the total ______traveled
divided by the total time taken to travel that distance.
Directed Reading B continued
9.One of the ways to express speed is by using the SI unit of ______.
10.Name two other units often used for expressing speed.
______
______
11.What is the equation for average speed?
______
12. Speed can be represented on a graph where ______is
plotted on the x-axis and position of the object is plotted on the y-axis.
13.In the graph in your book illustrating the speed of a dog walking beside a fence, why does the distance traveled in a given second vary?
______
______
Velocity: Direction Matters
14.How could two birds flying at the same speed from the same starting point end up at different destinations?
______
______
15.What is the difference between velocity and speed?
______
______
16.What can change when an object’s velocity changes?
______
______
Acceleration
17._Acceleration is the rate at which ______changes
over time.
18. The units of ______are the units of velocity divided by a
unit of time.
Directed Reading B continued
19.______A common unit for acceleration is meters per second per
______.
20._An increase in speed is sometimes called ______
acceleration.
21.What are the two terms sometimes used to describe a decrease in speed?
______
______
22.Why is an object traveling in a circle considered to be accelerating?
______
______
______
23. The type of acceleration that occurs when an object travels at a constant
speed in circular motion is called ______acceleration.
24.______Acceleration can be shown on a graph of speed versus
______.
25.In the graph in your book showing the acceleration of a radio-controlled toy car over 10s, how can you tell acceleration is positive from 0s to 5s?
______
______
26.In the same figure, how can you tell that the speed of the radio-controlled car is constant between 5s and 7s?
______
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