# Chapter 2: One Dimensional Kinematics (Straight Line Motion)

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Kinematics

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## Tags and Description

### 29 Terms

1

Kinematics

Deals with the concepts that are needs to describe motion. How things move in a straight line.

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Dynamics

The effect that forces have on motion.

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3

$x_{0}$

initial position

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4

$x$

final position

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5

$\Delta$

“change in”

final - initial

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6

$\Delta x=x-x_{0}$

Equation for displacement

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7

One-dimensional kinematics

Deals with motion along a straight line, considering only one direction.

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8

Displacement

The change in position of an object. It is a vector quantity, having both magnitude and direction. Symbolized by Δx.

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Velocity

The rate of change of displacement. It is a vector quantity, having both magnitude and direction. It is calculated as the displacement divided by the elapsed time.

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10

$\overrightarrow{v}=\dfrac{\Delta \overrightarrow{x}}{\Delta t}$

Equation for average velocity

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moving in the positive direction

If average velocity is positive, the object is…

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moving in the negative direction

If average velocity is negative, the object is…

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not moving

If average velocity is zero, the object is…

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14

$v=$ total distance/total time

Equation for average speed

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15

Speed

The rate of change of distance traveled. It is a scalar quantity, having only magnitude. It is calculated by the total distance traveled divided by the time taken.

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Acceleration

The rate of change of velocity. It is a vector quantity, having both magnitude and direction. It is calculated as the change in velocity divided by the time taken.

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increasing with time

If average acceleration is positive, the speed is…

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decreasing with time

If average acceleration is negative, the speed is…

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at constant speed

If average acceleration is zero, the speed is…

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20

Equations of Motion

The equations that relate displacement, velocity, acceleration, and time.

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21

$x$

Variable for displacement

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22

$a$

Variable for acceleration

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$v$

Variable for velocity

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$v_{0}$

Variable for initial velocity

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$t$

Variable for time

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26

Free fall

All bodies at the same location above the Earth fall vertically with the same acceleration.

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Acceleration due to gravity

The motion of free fall and the acceleration of a freely falling body

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-9.80 m/s²

Acceleration (a) is equal to

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9.80 m/s²

Acceleration due to gravity (g) is equal to

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