Name
Date
Class
Overview
Work and Energy
Directions: Complete the concept map using the terms in the list below.
distance
mechanical energy
potential energy
machines
motion
work
force
object
multiply
motion
2.
4.
times
can be made
easier with
equals
3.
that
5.
1.
force.
transfers
Energy
due to
in
stored in an
6.
is
7.
is
8.
position and
motion
is
9.
kinetic energy
Work and Energy
15
Name
Date
Class
Section 1 ■ Work and Machines
Section 2 ■ Describing Energy
Directions: Determine whether the italicized term makes each statement true or false. If the statement is true,
write true in the blank. If the statement is false, write the term that makes the statement true.
1. When a force is applied through a distance, work is done.
2. A device that makes energy easier is a machine.
3. The work done to a machine is input work.
4. A device that does work with only one movement is a
simple machine.
5. The efficiency is the number of times a machine multiplies
the input force.
Directions: Use these words to fill in the blanks below. Words may be used more than once.
energy
more
kinetic
less
joule
gravitational potential
chemical
6. Two baseballs have the same mass. The ball that is closer to the ground has
gravitational potential energy than the other ball does.
7. Two trucks have the same velocity but different mass. The truck with the greater
mass has
kinetic energy than the other truck does.
8.
9. A
is the ability to cause change.
is a unit of measure of all forms of energy.
10. When an object falls, some of its
energy.
11. The
energy of an object depends on its mass and height.
12. The energy of food and other fuels is
16 Work and Energy
energy changes to
potential energy.
Name
Date
Class
Section 3 ■ Conservation
of Energy
Directions: Write the term that matches each description below on the spaces provided. The boxed letters
should spell the answer to question 9.
1. Type of energy due to both the position and motion of an object
2. The rate at which energy is converted
3. Type of energy transformed into thermal energy in a toaster
4. Force that acts between two sticks when they are rubbed together
5. Unit used to measure the amount of energy that people get from food
6. Type of energy transformed into chemical energy by plants
7. Type of energy that is greatest at the top of a swing’s path
8. Type of energy that is greatest at the bottom of a swing’s path
9. What law of energy has never been broken?
Work and Energy
17
Name
Date
Class
Key Terms
Work and Energy
Directions: Unscramble the terms in italics to complete the sentences below. Write the terms on the lines provided.
1. A nimcsh amleiep is a machine that does work with
only one movement of the machine.
2. The ratio of output work to input work is the
ynieficcef of a machine.
3. Rokw is the measure of the force that is applied over a
distance.
4. The ratio of output force to input force of a machine
is its haevangcla nacmeidta.
5. A humpcnid enocaom is made of two or more simple
machines.
6. The stored energy an object has as a result of its
height above the ground is aaagiilnrottv potential
energy.
7. The law of aceinnoorstv of energy states that the total
amount of energy in the universe remains the same.
8. Energy is measured in SI units called ejlosu.
9. The energy stored in the bonds between atoms is
accehilm potential energy.
.10. The stored energy an object has as a result of its
position is aeilnoptt energy.
.11. Energy in the form of motion is ceiiknt energy.
.12. An object’s aaccehilmn energy is its total amount of
potential and kinetic energy.
.13. The energy stored in stretched or compressed objects
is aceilst potential energy.
18 Work and Energy