Chapter 3: Motion and Forces
Goals of Period 3
Section 3.1: Section 3.2: Section 3.3: Section 3.4: Section 3.5: To define speed and velocity as rates To explain the cause of changing velocity forces To define changes in velocity - acceleration To examine
Solutions to Period 4 Exercises
E.1 The gravitational force between two objects a) increases as the distance between them increases. b) decreases as the distance between them increases. c) acts to push objects apart.
d) is felt more by the object with sma
Preview of Period 3: Motion and Forces
3.1 More about Rates Speed and Velocity What is the relationship among speed, distance and time of travel? What is the difference between speed and velocity? 3.2 Introduction to Forces What causes a change in velocit
Solutions to Period 3 Exercises
E.1 Which of the following is TRUE?
a) 3 meters/second is not a rate.
b) 2 beers a week is not a rate.
12 feet at 3 o'clock is not a rate.
d) 45 miles per hour is not a rate.
e) all of the above are rates
12 feet at 3 o'
Preview of Period 2: Forms of Energy
2.1 Forms of Energy How are forms of energy defined?
Energy Conversions What happens when energy is converted from one form into another form?
Efficiency of Energy Conversions How efficient are energy conversio
Solutions to Period 2 Exercises
E.1 Which energy conversion is involved in the process of photosynthesis? a) nuclear energy to thermal energy b) electrical energy to thermal energy c) radiant energy to chemical energy d) mechanical energy of motion to rad
Chapter 2: Forms of Energy
Goals of Period 2
Section 2.1: Section 2.2: Section 2.3: Section 2.4: To describe the forms of energy To illustrate conversions from one form of energy to another To define the efficiency of energy conversion processes To descri
Introduction to the World of Energy
1.1 Ratios and per How can ratios simplify problem solving? How are ratios used to find efficiency? 1.2 Exponents and Scientific Notation Why is scientific notation helpful? How does it work? 1.3 Energy Sources How much
Answers to Period 1 Exercises
E.1 The British thermal unit (BTU) is a common unit
of measurement for thermal energy. If one
gallon of gasoline contains 126,000 BTU's, what
is the energy content of 10 gallons of gasoline?
1.26 x 104 BTU's
1.26 x 105
Chapter 1: Introduction to the World of Energy
Goals of Period 1
Section 1.1: Section 1.2: Section 1.3: Section 1.4: Section 1.5: To introduce The World of Energy To define ratios and "per" To review scientific notation To introduce energy sources To defi
Course Schedule and Assignments
Spring Quarter 2009
Classes meet twice each week for a 2-hour class
in 2005 Smith (Mon/Weds or Tues/Thurs)
During class, your instructor will
explain physics concepts
perform demonstrations to illustrate the concepts
DVDs of the 1-hour lecture videos shown on
Tuesdays at 7:00 pm are on closed reserve at the
Science and Engineering Library reserve desk
DVDs may be checked out for two hours.
OSU student ID is required.
If you use the librarys computers
Name _ Section _
Period 18 Activity Sheet: Information Transfer
Activity 18.1: Information Transfer Using Electrical Energy
1) Briefly connect the loudspeaker on your table to a 1.5 volt battery. Place your hand on
the speaker as someone q
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Period 17 Activity Sheet: Induction Motors and Transformers
Activity 17.1: How Can Current Be Induced in a Closed Circuit?
a) Connect the tan coil of wire to the large galvanometer that measures electric current. Move a magnet near and in
Name _ Section _
Period 16 Activity Sheet: Motors
16.1 How Do Direct Current (DC) Electric Motors Work?
Spinning rotors. In this activity, we see why the rotor of an electric motor spins.
a) Place a permanent magnet on a plastic spinner and make the magne
Name _ Section _
Period 15 Activity Sheet: Magnetic Forces and Electromagnets
Caution: Our class activities use strong magnets. While these magnets are not dangerous to your health, they can permanently damage objects with magnetic information. Keep watch
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Period 14 Activity Sheet: Electrical Safety and Transmission
Activity 14.1: How Do Fuses and Circuit Breakers Prevent Fires?
a) Fuse Demonstration with a Short Circuit Connect a piece of solder and a four bulb tray in series to a step-dow
Preview of Period 4: Gravity, Mass, and Weight
4.1 Center of Gravity Where does the force of gravity appear to act on an object? 4.2 Center of Mass How can you find the center of mass of an object? Why is the location of the center of mass useful?
Solutions to Period 5 Exercises
E.1 Which of the following is TRUE? a) The strong force is not a fundamental force. b) The electromagnetic force is not a fundamental force. c) The weak force is not a fundamental force.
d) The frictional force is not a fun
Preview of Period 5: Forces and Newtons Laws
5.1 The Fundamental Forces of Nature What are the four fundamental forces of nature? How do we see their effects? 5.2 Forces and Newtons Laws What causes an object to move? How are force, acceleration, and the
Solutions to Period 14 Exercises
E.1 Household wiring (120 volts) is usually divided into several fused circuits, each with a fuse or circuit breaker that blows when the current exceeds 15 amps. If you operate a 250 watt TV, a 1000 watt iron, and two 100
Preview of Period 13: Electrical Resistance and Joule Heating
13.1 Electrical Resistance of a Wire
What does the resistance of a wire depend upon? 13.2 Resistance and Joule Heating
What effect does resistance have on current flow? What is joule heating? 1
Solutions to Period 13 Exercises
E.1 What is the resistance of a 50 cm length of silver wire that has a cross sectional area 2 of 0.005 m ? The resistivity of silver at 8 room temperature is 1.6 x 10 m. a) 1.6 x 10 b) 1.6 x 10 c) 1.6 x 10 d) 3.2 x 10 e) 3
Preview of Period 12: Electric Circuits
12.1 Voltage, Current, and Resistance
How are voltage, current, and resistance related? 12.2 Resistance and Voltage of Resistors in Connected in Series
How does current flow through a series circuit? 12.3 Resistance
Solutions to Period 12 Exercises
E.1 You have four identical pieces of wire.
Each wire is 10 feet long and has a
resistance of 1.0 ohm. If you connect the
four wires in series, what is their combined
a) 0.25 ohms
b) 1 ohm
d) 4 ohms
Preview of Period 11: Electric Current
11.1 Electric Charge How does electric charge do work? Electric Circuits How does a flashlight work? Electric Current What is electric current? Voltage Boosts and Drops What happens to the voltage of electric charge
Solutions to Period 11 Exercises
E.1 On a cold morning your car starter motor cranks for 10 seconds, drawing 60 amps (= 60 coul/sec) of current from your 12 volt battery. How much charge (in coul) flowed through the starter motor? a) c) 6 coul 120 coul b)
Preview of Period 10: Electric Charge and Force
10.1 Electric Charge and Forces
What happens when you place a negatively charged rod near an object? How do charges cause objects to move?
Conductors, Insulators, and Separation of Charge
How can you ma
Solutions to Period 10 Exercises
E.1 Suppose that the Styrofoam ring you
levitated in class has a mass of 0.005
grams and floated 5 cm above the rod.
How large was the electrical force that
supported the ring? (Hint: what forces
act on the floating ring?
Preview of Period 9: Power
9.1 Measuring the Power of Appliances How much power do appliances use? 9.2 Measuring Your Power How much power do you use for daily activities?
Measuring the Cost of Electricity How much does electricity cost?