# Unit 4 CBA review

### 29 terms by GTDrummer

#### Study  only

Flashcards Flashcards

Scatter Scatter

Scatter Scatter

## Create a new folder

### What is the formula for speed?

Speed= distance/time

Speed/ distance

### What is constant speed?

When the speed does not change

### What is the difference between balanced and unbalanced forces?

Balanced forces: no movement
Unbalanced forces: movement

False

Unbalanced force

### What is net force?

All the forces added together, but with forces in different directions, subtract

Newtons

...

### What 2 factors are used to determine the speed of an object?

Time and distance

### What is velocity? What is its formula?

Speed of an object in a particular direction. Distance + direction/ time

### What is acceleration? How do you calculate it?

Rate at which velocity changes. Final velocity - Initial velocity/ time

...

Negative

### What is the difference between speed and velocity?

Velocity has a direction, while speed is just motion

### What is a dependent variable?

"Depends" on the independent variable. DRY mix
Y- axis

### What is an independent variable?

Goes by itself, does not depend on anything. dry MIX
X- axis

### What is initial velocity?

The velocity an object starts with

### What is mass? What unit is used to measure it?

The amount of "stuff" inside an object. Grams

### What is distance? What unit is used to measure it?

The space between 2 points. Meters

### What is force? Unit? Formula?

A push or a pull. Newtons. Force = mass x acceleration

### What is an action force? What is a reaction force? Give examples.

Action force: Force acting on an object. Ex: Push a ball.
Reaction force: Result of an action force. Ex: The ball rolls.

### What is friction? Give an example.

Force occurring then any 2 objects rub together. Ex: Rubbing hands together; friction creates heat.

### What is gravity? How does it apply to physics?

The force holding everything down. It creates potential energy and pulls stuff down.

### What is inertia? Which one of Newton's Laws does it apply to?

The reluctance of an object to change its state of motion.
Newton's 1st law

### What is the difference between mass and weight?

Mass is the amount of stuff inside something. Gravity is the amount gravity is pulling on the object.

### What does Newton's 1st law state? Formula? Give an example.

An object at rest, stays at rest, an object in motion stays in motion/ the reluctance of an object to change its state of motion. No formula. Inertia.

### What does Newton's 2nd law state? Formula? Give an example.

Force = mass x acceleration. F = m x a. A truck has more force than a golf cart.

### What does Newton's 2rd law state? Formula? Give an example.

For every action, there is an equal and opposite reaction. No formula. Pushing a ball.

Example: