# Physics- One Dimensional Motion

### 14 terms by amelia001

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### Scalar

a quantity that has magnitude only

### vector

a quantity that has BOTH magnitude and direction

### Distance

The total length of a path an object travels. (how far you go)
--Scalar

### Displacement

The change in position of an object described by a vector that begins at the initial position and ends at its final position. (how far you go in a specific direction)
--Vector

### Particle Model of Motion

A simplified version of a motion diagram in which the object in motion is replaced by a single point.

### Speed

the distance an object moves in a given time.
--Scalar

### Velocity

the displacement an object moves in a given period of time.
--Vector

### Velocity Formula

v-bar=d/t
d=displacement
t=time
v-bar=average of v-final and v-initial

### Acceleration

The rate at which velocity changes.

### Free Fall

The ideal falling motion of an object in which the gravitational force is the only force acting on the object.

### Acceleration due to gravity on Earth

The change in velocity in a given period of time as an object falls freely toward the earth.

g = 9.8 m/s2

a=Δv/t

d = vit + ½ at2

Example: