Type of Friction
Forces
Balanced or Unbalanced?
Gravity
Potpourri

### 100

Why do you slip and fall when walking on ice?

The coefficient of static friction is very low.

### 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. double sided sticky tape on the wall.

Static friction.

### 200

Friction is a force that acts _____________ the motion of an object.

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 __________________.

spring scale

### 300

Who generates more friction with the ground, Mr. Kubin or Mr. Zwirn?

It depends on the type of shoes they are wearing.

Zwirn for half.

### 300

All forces have both ______________ 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

kinetic 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. static 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?