# Motion

Some information taken from CGP Physics Revision Guide and Workbook.

Hope it helps x

- Created by: Cristina
- Created on: 24-12-10 11:05

## Slides in this set

### Slide 1

Motion

Forces in Motion Topic 1…read more

### Slide 2

Distance/Time Graphs

Distance

Distance

ed

pe

tS

an

Stationary Object Gradient = speed

st

n

Co

The steeper the graph,

the faster it's going.

An object moving at a

steady speed travels the

Time Time same distance every

second.

Distance

Distance

The steeper the line on

a distance-time graph

of a moving object, the

greater its speed is.

Object Speeding

Up (Accelerating)

Object Slowing Down

(Decelerating)

Time Time…read more

### Slide 3

Speed vs. Velocity

Speed

· Speed measures how fast you're going.

· It is measured in m/s.

Velocity

· Velocity measures speed in a given

direction.

· It is measured in m/s².…read more

### Slide 4

Useful Equations

Speed = Distance ÷ Time

D

S=D÷T

m/s = metres ÷ seconds SxT

e.g. Mary ran 200m in 40 seconds. What is

her speed?

200 ÷ 40 = 5m/s…read more

### Slide 5

Useful Equations

Acceleration is how quickly the velocity

is changing. Change

in

Acceleration = Change in Velocity ÷ Velocity

Time Taken

m/s² = m/s ÷ seconds Acceleration x Time Taken

e.g. A skulking cat accelerates steadily from 2 m/s to 6

m/s in 5.6 s.

What is its acceleration?

62=4

4 ÷ 5.6 = 0.71m/s…read more

### Slide 6

Velocity/Time Graphs

Velocity

Distance

n

t io

ra

le

ce

Steady Speed Gradient = acceleration.

Ac

Flat sections represent

steady speed.

The steeper the graph, the

greater the acceleration or

deceleration.

Uphill sections (/) are

Time Time acceleration.

Downhill sections (\) are

Distance

Distance

deceleration.

Distance = area of graph.

A curve means changing

acceleration.

D

ec

el

er

at

io

n

Increasing

Acceleration

Time Time…read more

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