## 1. Centripical Force

### 1.1. Definition

1.1.1. A force directed toward the center of a curve

1.1.2. F(centripical)=m(v^2/r)

### 1.2. Example

1.2.1. when your car goes around a bend, you slide to the inside

## 2. Centripetal Accleration

### 2.1. Definition

2.1.1. analysis of constant speed of circular motion

2.1.2. v^2/r

### 2.2. Example

2.2.1. the difference between two radii

## 3. Circumference

### 3.1. Definition

3.1.1. C=3.14d

3.1.2. The distance around a circle, the distance traveled in once revolution

### 3.2. Example

3.2.1. When swinging a yo-yo around, the distance traveled in one revlolution

## 4. Tengential Velocity

### 4.1. Definition

4.1.1. velocity of the tangent if a constantly moving circular motion

4.1.2. V=2(3.14)r/t

### 4.2. Example

4.2.1. the speed that you are moving around a merry-go round