Forces, Friction, & Newton's Laws - review
Presentation
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Science
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7th Grade
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Practice Problem
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Easy
+4
Standards-aligned
Miss ERWAY
Used 15+ times
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28 Slides • 26 Questions
1
Forces, Friction, & Newton's Laws
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2
Multiple Select
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Multiple Choice
What is the net force?
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Multiple Choice
What is the net force?
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Multiple Choice
What do you see in this picture?
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Multiple Choice
What direction will this object move?
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Multiple Choice
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Multiple Choice
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Friction
Friction is a force. It stops objects from moving.
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Multiple Choice
A person having difficulty pushing a box.
What type of friction is shown in this picture?
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Sliding friction
The friction force works against the motion & makes it harder to move objects.
more friction = harder to move
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Multiple Choice
A couch standing still in your living room.
What type of friction is shown in this picture?
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Static Friction
Static friction keeps objects in one place. The couch is staying in one place.
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Multiple Choice
A snowball moving down the hill will eventually stop.
What type of friction is shown in this picture?
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Rolling Friction
Rolling friction slows down objects that are rolling across a surface.
like a wheel or a ball
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Multiple Choice
How much applied force do you need in order to move this box?
The friction force is 100 N.
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Open Ended
Why did the person fall off the skateboard?
The person fell off the skateboard because.....
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Multiple Select
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The girls will keep sliding down the hill until a force stops them
maybe they will hit a snow pile and stop.
Maybe the force of friction will slow them down.
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Open Ended
Which object has the most INERTIA?
(Which object would the most difficult to stop if it were moving?)
(which object would require the most force to move it?)
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The airplane
an airplane has the most mass .
moe mass = more inertia
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use this picture of two objects for the next two questions.
The red arrows show gravity between these two objects.
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Multiple Choice
What happens to the force of gravity between two objects if they move farther apart?
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Gravity depends on distance
closer objects have more gravity.
objects that are farther apart have less gravity.
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Multiple Choice
What happens to the force of gravity between two objects if the mass of one (or both) of the objects increases?
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Gravity depends on mass
more mass = more gravity
less mass = less gravity
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Multiple Choice
Where is the most gravitational pull?
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Multiple Choice
Where is the weakest (least) gravitational pull?
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The closest point = more gravity.
The farther point = less gravity
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Multiple Choice
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Multiple Choice
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Mass and weight are not the same
mass = kg
weight = gravity on an object
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To Prove it....
Mass is the same on Earth and on Mars.
Weight is different because there is different gravity on the Earth and on Mars.
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Multiple Choice
what will happen if you apply more force to the cart?
(push the cart harder)
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Multiple Choice
Which object will require more force to move it?
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Mass & Force
you need to apply more force to move an object that has more mass.
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Multiple Choice
which object will accelerate faster?
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Multiple Choice
what is A?
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Multiple Choice
what is B?
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Open Ended
You bump your elbow on the corner of the table....
Name two forces present in this situation.
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Newton's Third Law
every action has an equal and opposite reaction
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Newtons' Third Law
Forces, Friction, & Newton's Laws
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