Name
LESSON
Date
Outline
Potential and Kinetic Energy
Use your textbook to help you fill in the blanks.
What is energy?
1. Work done on an object changes the amount of
energy
that the object has.
force
2. Work is equal to the
by the
applied.
distance
over which the force was
newton-meters
3. The units of work are
joules
used multiplied
, or
.
joules
4. Energy is measured in units called
elastic potential
5. A stretched spring has
.
energy.
6. Lifting a ball increases its gravitational potential energy.
7. Chemical energy, elastic energy, and gravitational energy are
potential
different forms of
energy.
What is kinetic energy?
8. Heat, electricity, sound, and light are different forms of
© McGraw-Hill Education
kinetic
energy.
9. The amount of kinetic energy an object has depends on the
object’s
velocity
.
Unit 3 • Force, Motion, and Energy Transformations
Unit Resources
Use with Lesson 3
Potential and Kinetic Energy
3-33
LESSON
Outline
Name
Date
How can energy change?
created
10. Energy cannot be
destroyed
; it can only
or
change form
.
11. Whenever energy is used to do work, energy
changes form
.
12. Electricity does work in an oven by moving particles around
and changing into
heat
.
Critical Thinking
13. Trace the energy changes that occur in a toaster, in a radio,
and in a windmill used to generate electricity.
Energy is never created or destroyed, but it does change form. In a
toaster, electrical energy is changed into heat and light. In a radio,
electrical energy is changed into the kinetic energy of the vibrating
speaker, sound energy, and a little heat. In the windmill, kinetic
energy of moving air turns the blades, which spin a generator that
turns energy of motion into electrical energy.
© McGraw-Hill Education
3-34
Unit 3 • Force, Motion, and Energy Transformations
Unit Resources
Use with Lesson 3
Potential and Kinetic Energy