Forces: Effects of Multiple Forces on Objects
FORCES LESSON 5B
What Happens If More Than One
Force Pushes or Pulls an Object?
Review: Three Scenarios
•
What happened when the force that friction
exerted on the file cabinet and the force
Sarah exerted were
equal
(the same)?
•
What happened when the force that friction
exerted on the file cabinet and the force
Sarah exerted were
unequal
(not the same)?
•
In which scenario(s) did the cabinet move?
Today’s Focus Question
What happens if more than one force pushes
or pulls an object?
A Pencil on a Table
A pencil is sitting perfectly still on a table. Do
you think any forces are acting on the pencil?
A Pencil on a Table
Gravity
A pencil is sitting perfectly still on a table. Do
you think any forces are acting on the pencil?
Investigation: Describe the Forces
1.
Complete part 2 of handout 5.1 (Describe the
Forces).
2.
Complete the tasks for the first scenario (the
pencil on a table) based on our discussion.
3.
Then work on the final scenario (the tree fort).
You may discuss the scenario with a partner, but
complete the handout tasks on your own.
4.
Think about how gravity is involved in each
scenario and make sure to include science ideas
about forces in your explanations.
Follow-Up: Describe the Forces
•
Listen carefully as your classmate explains
what happened with the file cabinet in the
three scenarios.
•
Be prepared to agree or disagree, ask
questions, or add on. Let’s communicate in
scientific ways!
•
Think about this question:
How is the force
of
gravity
involved in each scenario?
Let’s Summarize!
Today’s focus question:
What happens if more than
one force pushes or pulls an object?
Think about each scenario on our handout. For
each scenario, you drew more than one arrow to
represent the forces acting on an object.
•
What happened with the arrows (forces) in the
scenarios where an object
didn’t
move?
•
What happened with the arrows (forces) in the
scenarios where an object
did
move?
Let’s Summarize!
Today’s focus question:
What happens if more than
one force pushes or pulls an object?
Use these sentence starters to answer the focus
question in your science notebook:
•
If forces of
equal
(the same) strength are pushing
or pulling an object in opposite directions, the
object will ____________.
•
If forces of
unequal
(not the same) strength
are pushing or pulling an object in opposite
directions, the object will ____________.
Next Time
In our next lesson, you’ll use everything you’ve
learned about forces and motion to predict
and explain the motion of objects in real life.
Are you ready to show what you know?
Exploring the impact of multiple forces on objects through scenarios involving friction, pushing, and pulling. Students investigate the role of gravity and analyze how different forces influence the movement or stability of objects. The lesson includes hands-on activities and discussions to deepen understanding of forces in action.
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Presentation Transcript
FORCES LESSON 5B What Happens If More Than One Force Pushes or Pulls an Object?
Review: Three Scenarios What happened when the force that friction exerted on the file cabinet and the force Sarah exerted were equal (the same)? What happened when the force that friction exerted on the file cabinet and the force Sarah exerted were unequal (not the same)? In which scenario(s) did the cabinet move?
Todays Focus Question What happens if more than one force pushes or pulls an object?
A Pencil on a Table A pencil is sitting perfectly still on a table. Do you think any forces are acting on the pencil?
A Pencil on a Table A pencil is sitting perfectly still on a table. Do you think any forces are acting on the pencil? Gravity
Investigation: Describe the Forces 1. Complete part 2 of handout 5.1 (Describe the Forces). 2. Complete the tasks for the first scenario (the pencil on a table) based on our discussion. 3. Then work on the final scenario (the tree fort). You may discuss the scenario with a partner, but complete the handout tasks on your own. 4. Think about how gravity is involved in each scenario and make sure to include science ideas about forces in your explanations.
Follow-Up: Describe the Forces Listen carefully as your classmate explains what happened with the file cabinet in the three scenarios. Be prepared to agree or disagree, ask questions, or add on. Let s communicate in scientific ways! Think about this question: How is the force of gravity involved in each scenario?
Lets Summarize! Today s focus question: What happens if more than one force pushes or pulls an object? Think about each scenario on our handout. For each scenario, you drew more than one arrow to represent the forces acting on an object. What happened with the arrows (forces) in the scenarios where an object didn t move? What happened with the arrows (forces) in the scenarios where an object did move?
Lets Summarize! Today s focus question: What happens if more than one force pushes or pulls an object? Use these sentence starters to answer the focus question in your science notebook: If forces of equal (the same) strength are pushing or pulling an object in opposite directions, the object will ____________. If forces of unequal (not the same) strength are pushing or pulling an object in opposite directions, the object will ____________.
Next Time In our next lesson, you ll use everything you ve learned about forces and motion to predict and explain the motion of objects in real life. Are you ready to show what you know?
