Upload
others
View
4
Download
0
Embed Size (px)
Citation preview
4 Forces in One Dimension BIGIDEAWrite the Big Idea for this chapter.
Use the “What I Know” column to list the things you know about the Big Idea. Then list the questions you have about the Big Idea in the “What I Want to Find Out” column. As you read the chapter, fill in the “What I Learned” column.
KWhat I Know
WWhat I Want to Find Out
LWhat I Learned
Science Notebook • Forces in One Dimension53
Program: TX HS Science Component: PPP SCI NTBKPDF PASS
Vendor: LASERWORDS Grade: N/A
053_070_PPP_SN_C04_666028.indd 53053_070_PPP_SN_C04_666028.indd 53 6/6/13 10:33 AM6/6/13 10:33 AM
Copy
righ
t © M
cGra
w-H
ill E
duca
tion.
Per
mis
sion
is g
rant
ed to
repr
oduc
e fo
r cla
ssro
om u
se.
3(F), 4(D), 4(E)
4 Forces in One Dimension 1 Force and Motion
MAIN IDEAWrite the Main Idea for this section.
Recall and write the definition of the Review Vocabulary term.
acceleration
Use your book to define each term.
force
system
free-body diagram
net force
Newton’s second law
Newton’s first law
inertia
equilibrium
REVIEW VOCABULARY
acceleration
NEW VOCABULARY
force
system
free-body diagram
net force
Newton’s second law
Newton’s first law
inertia
equilibrium
Science Notebook • Forces in One Dimension54
Program: TX HS Science Component: PPP SCI NTBKPDF PASS
Vendor: LASERWORDS Grade: N/A
053_070_PPP_SN_C04_666028.indd 54053_070_PPP_SN_C04_666028.indd 54 6/6/13 10:33 AM6/6/13 10:33 AM
Copyright © M
cGraw
-Hill Education. Perm
ission is granted to reproduce for classroom use.
Student Edition, pp. 90–91
1 Force and Motion (continued)
Describe Write a few short sentences answering each question.
What is force?
What are two types of forces?
How do you represent forces?
GET IT? Identify the cause of all accelerations.
Describe what a system is, and draw an example of one in the box below. Draw a circle around your system, and label the system and the external world.
Science Notebook • Forces in One Dimension55
Program: TX HS Science Component: PPP SCI NTBKPDF PASS
Vendor: LASERWORDS Grade: N/A
053_070_PPP_SN_C04_666028.indd 55053_070_PPP_SN_C04_666028.indd 55 6/6/13 10:33 AM6/6/13 10:33 AM
Copy
righ
t © M
cGra
w-H
ill E
duca
tion.
Per
mis
sion
is g
rant
ed to
repr
oduc
e fo
r cla
ssro
om u
se.
Identify six guidelines used to draw a free-body diagram.
GET IT? Compare the direction of an object’s acceleration with the direction of the unbalanced force exerted on the object.
Summarize what the term net force means.
Student Edition, pp. 92–93
1 Force and Motion (continued)
Science Notebook • Forces in One Dimension56
Program: TX HS Science Component: PPP SCI NTBKPDF PASS
Vendor: LASERWORDS Grade: N/A
053_070_PPP_SN_C04_666028.indd 56053_070_PPP_SN_C04_666028.indd 56 6/6/13 10:33 AM6/6/13 10:33 AM
Copyright © M
cGraw
-Hill Education. Perm
ission is granted to reproduce for classroom use.
Student Edition, pp. 94–96
1 Force and Motion (continued)
Explain what a spring scale is and how it is used.
Draw a simple straight-line graph showing Force v. Acceleration, and
explain how the graph is related to the physics equation a = Fnet _ m .
GET IT? Determine how the force exerted on an object must be changed to reduce the object’s acceleration by half.
State Newton’s second law, and write the equation for it below.
Science Notebook • Forces in One Dimension57
Program: TX HS Science Component: PPP SCI NTBKPDF PASS
Vendor: LASERWORDS Grade: N/A
053_070_PPP_SN_C04_666028.indd 57053_070_PPP_SN_C04_666028.indd 57 6/6/13 10:33 AM6/6/13 10:33 AM
Copy
righ
t © M
cGra
w-H
ill E
duca
tion.
Per
mis
sion
is g
rant
ed to
repr
oduc
e fo
r cla
ssro
om u
se.
TRY IT!
Problem
A toddler is holding a toy with a mass of 1.1 kg when another toddler decides that she wants it. The first toddler pulls horizontally with a force of 2.5 N and the second toddler pulls horizontally with a force of 3.1 N in the opposite direction. What is the horizontal acceleration of the toy?
1. ANALYZE AND SKETCH THE PROBLEM
KNOWNS UNKNOWN
m = = ?
Ffirst toddler =
Fsecond toddler =
2. SOLVE FOR THE UNKNOWN
Fnet = Ffirst toddler + Fsecond toddler
Use Newton’s second law.
3. EVALUATE THE ANSWER
• Does the sign make sense?
Student Edition, p. 97
Use with Example Problem 1
Use this column for
scratch work and
sketches.
1 Force and Motion (continued)
Science Notebook • Forces in One Dimension58
Program: TX HS Science Component: PPP SCI NTBKPDF PASS
Vendor: LASERWORDS Grade: N/A
053_070_PPP_SN_C04_666028.indd 58053_070_PPP_SN_C04_666028.indd 58 6/6/13 10:33 AM6/6/13 10:33 AM
Copyright © M
cGraw
-Hill Education. Perm
ission is granted to reproduce for classroom use.
Fill in the blanks about Newton’s first law.
According to Newton’s first law, an object at will remain
at , and an object that is moving will continue to move
in a straight line with constant , if and only if the net force
acting on that object is . Newton’s first law is sometimes
called the law of . If the net force on an object is zero, then
the object is in .
Apply Imagine a rock moving in space with no forces acting on it. According to Newton's first law, what will happen to the rock?
Student Edition, p. 98–99
1 Force and Motion (continued)
SUMMARIZE
How does the MAINIDEA for this section relate to the chapter’s BIGIDEA?
REVIEW IT !
12. MAINIDEA Identify each of the following as either a, b, or c: mass, inertia, the push of a hand, friction, air resistance, spring force, gravity, and acceleration.
a. contact force
b. a field force
c. not a force
Science Notebook • Forces in One Dimension59
Program: TX HS Science Component: PPP SCI NTBKPDF PASS
Vendor: LASERWORDS Grade: N/A
053_070_PPP_SN_C04_666028.indd 59053_070_PPP_SN_C04_666028.indd 59 6/6/13 10:33 AM6/6/13 10:33 AM
Copy
righ
t © M
cGra
w-H
ill E
duca
tion.
Per
mis
sion
is g
rant
ed to
repr
oduc
e fo
r cla
ssro
om u
se.
1 Force and Motion (continued)
13. Free-Body Diagram Draw a free-body diagram of a bag of sugar being lifted by your hand at an increasing speed. Specifically identify the system. Use subscripts to label all forces with their agents. Remember to make the arrows the correct lengths.
14. Free-Body Diagram Draw a free-body diagram of a water bucket being lifted by a rope at a decreasing speed. Specifically identify the system. Label all forces with their agents and make the arrows the correct lengths.
15. Critical Thinking A force of 1 N is the only horizontal force exerted on a block, and the horizontal acceleration of the block is measured. When the same horizontal force is the only force exerted on a second block, the horizontal acceleration is three times as large. What can you conclude about the masses of the two blocks?
Science Notebook • Forces in One Dimension60
Program: TX HS Science Component: PPP SCI NTBKPDF PASS
Vendor: LASERWORDS Grade: N/A
053_070_PPP_SN_C04_666028.indd 60053_070_PPP_SN_C04_666028.indd 60 6/6/13 10:33 AM6/6/13 10:33 AM
Copyright © M
cGraw
-Hill Education. Perm
ission is granted to reproduce for classroom use.