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1

distance/time

What is the equation for speed

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2

instantaneous speed

the speed of an object at one instant of time

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3

average speed

total distance divided by total time

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4

Relative motion

how fast one thing is compared to another

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5

speed

a measure of how far something travels in a particular time

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6

distance time graph

a graph that compares time against distance is a

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7

curve of the graph

Acceleration is shown by the

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8

accelerating

if the speed is increasing the object is...

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9

atomspheric pressure

the pressure caused by the weight of the atmosphere

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10

higher the pressure

the lower you go the...

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11

lower the pressure

the higher you go the...

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12

water pressure

the downward push of water that increases as you go down

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13

incompressible

Not able to be compressed or squashed. Water is...

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14

Greater

In a balloon, the pressure is........than the atomaspheric pressure

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15

Faster

The higher the temperature, the ...... the particles move

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16

Gradient

Speed is shown by the....... of the graph

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17

Still

On a distance time graph, if the line is horizontal, the object is......

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18

Gas pressure

The collisions between air molecules and its container

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19

The pressure increases

The smaller the container the more collisions. This means

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20

Density

Gas has a higher..... at sea level. This is because gravity pulls more molecules towards earth, there is more gas in a certain volume

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21

Pressure = force/area

What is the calculation for pressure

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22

Fulcrum

A small bar or rod on which something else turns

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23

moment

The turning effect of a force. This depends on the force being applied and how far it is from the pivot

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24

moment=force x distance from the pivot

What is the equation for moments

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25

The law of moments

An object is in equilibrium if the clockwise moments equal the anticlockwise moments. This is called....

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26

No turning force

If the centre of gravity is above the pivot then there is

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27

A turning force

If the entire of gravity is to the left or right of the pivot there is

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