Type of Friction
Forces
Balanced or Unbalanced?
Gravity
Potpourri
100
Name the type of friction. You are pushing against a wall and it won't move.
Static Friction
100
A push or a pull is called a ___________________.
force
100
If the net force equals zero, is it balanced or unbalanced?
balanced
100
A force of attraction between objects that is due to their masses is called ______________________.
gravity
100
True or False. The sun's gravitational force keeps the planets in their orbits.
True
200
Name the type of friction. You are roller skating down the street.
Rolling Friction
200
Friction is a force that acts _____________ the motion of an object. Choices: a) against b) in the same direction as
against
200
If there is movement, is the force balanced or unbalanced?
unbalanced
200
True or False. Only some matter experiences gravity.
False. All matter experiences gravity.
200

Weight is measured with a __________________.

scale

300
Name the type of friction. Walking on a wet floor.
Fluid Friction
300
All forces have ______________ and _________.
size direction
300
The Indigo and the Navy Teams are having a tug of war. The Navy Team pulls 25 N left and the Indigo Team pulls 47 N right. What is the net force? (Remember to give the direction also.) Is it balanced or unbalanced?
22N Right Unbalanced
300
The Law of Universal Gravitation states that the size of the force depends on the ________________ of objects and the ___________________ between them.
mass distance
300
True or False. There is no gravity on the moon.
False. There is gravity on the moon. It is less than the amount of gravitational force on the Earth.
400
Name the type of friction. Sledding down a hill
Sliding Friction
400
The unit used to label force is called ________________.
Newtons
400
You and your brother are moving a couch for your mom. You move the couch at 65 N Right and your brother moves the couch at 60 N Right. What is the net force? (Remember to include a direction in your answer.) Is the net force balanced or unbalanced?
125 N Right Unbalanced
400
True or False. If objects move farther apart their gravitational force is decreased.
True. (For example, the sun is so far away from us that it doesn't affect us as much as the gravitational pull of the Earth.)
400
_________________ is the measure of the gravitational force exerted on an object.
Weight
500
You are sliding your desk across the classroom and it creates a loud noise. You don't want it to be so loud the next time. What could you do so that it's easier to move the desk? What type of friction is this?
Add wheels to the desk. Rolling Friction
500
The combination of forces on an object is called the _____________________________.
Net force
500
You are having a tug of war with your puppy. You are pulling the rope with a force of 37 N Right and your puppy is pulling the rope at 37 N Left. What is the net force. (Remember the direction.) Is it balanced or unbalanced?
O N (No direction is needed.) Balanced
500
Why are we affected by the gravitational force of the Earth and not the gravitational force of a pencil?
We are affected by the gravitational force of the Earth because it is so large. Even though the pencil has gravitational force, it is too small to affect us.
500
If a person weighs 600 Newtons on the Earth. What is his weight on the moon?
100 Newtons (Divide by 6 to get your answer)
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