2. Ch. 10 , Lesson 4
( Doing Work )
•
• Is done when a force changes
the motion of an object.
• Ex. Picking up books is work:
• 1- You apply force
• 2-The motion of the books
changes.
• 3-it takes work to move the
books.
Vocabulary:
Work
Energy
Objectives:
I will be able to know:
Work happens when
there is change in
motion
2
Work
4. Ch. 10 , Lesson 4
( Doing Work )
• No matter how hard you
push, the wall does not
change.
•
Vocabulary:
Work
Energy
Objectives:
I will be able to know:
Work happens when
there is change in
motion
4
5. Ch. 10 , Lesson 4
( Doing Work )
• Who is doing Work?
•
Vocabulary:
Work
Energy
Objectives:
I will be able to know:
Work happens when
there is change in
motion
5
6. Ch. 10 , Lesson 4
( Doing Work )
• To do work you need Energy
•
• The ability to do work.
• Energy exists in different forms
• light Heat
• Sound
Electricity
• Stored Energy
Vocabulary:
Work
Energy
Objectives:
I will be able to know:
Work happens when
there is change in
motion
6
Energy
Energy
Energy of
motion
7. Ch. 10 , Lesson 4
( Doing Work )
• Energy of motion:
• Moving things has energy of
motion.
• Stored energy:
• Energy that can make an object
move.
• Ex. A ball at the top of hill has
stored energy , it can fall down.
•
Vocabulary:
Work
Energy
Objectives:
I will be able to know:
Work happens when
there is change in
motion
7
8. Ch. 10 , Lesson 4
( Doing Work )
• Other examples of stored
energy:
• Fuels batteries
•
•
•
• food
Vocabulary:
Work
Energy
Objectives:
I will be able to know:
Work happens when
there is change in
motion
8
9. Ch. 10 , Lesson 4
( Doing Work )
• Different food store
different amounts of
energy.
• The energy in food is
measured in calories.
•
Vocabulary:
Work
Energy
Objectives:
I will be able to know:
Work happens when
there is change in
motion
9
10. Ch. 10 , Lesson 4
( Doing Work )
• How does energy changes?
• Energy can change from one
form to another:
• Stored energy energy of
motion
• Friction Heat
• Energy can move from one
object to another.
Vocabulary:
Work
Energy
Objectives:
I will be able to know:
How energy changes.
10
11. Ch. 10 , Lesson 4
( Doing Work )
• Check for understanding:
• 1-give 5 examples of work.
• 2-what is energy?
• 3-how does energy change?
• 4-what energy change takes
place when you hold a heavy
box?
Vocabulary:
Work
Energy
Objectives:
I will be able to know:
Work happens when
there is change in
motion
11
12. When work is done
Activity Work
Thinking about a math problem
Turning a jump rope
Holding a puppy
Lifting a puppy
Pulling on a locked door
Opening an unlocked door
Trying to scoop rock-hard ice cream
