# Force and Motion

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Speed
How fast you are going (not with direction)
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Velocity
Speed and Direction
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Distance Time Graphs
Gradient=speed, Flat sections= stopped, Straight=constant speed, Steeper=faster
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Accelartion
How quickly velocity is changing, can be speed, direction or both
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Equation for Accelaration
Acceleration = change in velocity / time taken
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Velocity Time Graph
Gradient=acceleration, Flat sections=steady speed, Steeper=greater acceleration, Curve=change of acceleration, DISTANCE TRAVELLED = AREA UNDER GRAPH
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Weight
Force exerted by Gravitational Pull measured in Newtons, 10N on earth for GP
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Mass
Amount of matter inside of you, NOT A FORCE, measured in Kg
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Equation for Weight
Weight= Mass x Gravitational Pull
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Objects moving at a steady speed
NO RESULTANT FORCE
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Equation for Force
Force = Mass x Acceleration
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Friction
Slows down or stops object moving, Larger surface area means more drag
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Terminal Velocity
Highest velocity attainable by an object as it falls through air
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Stages of Terminal Velocity
1. Object accelerates as accelerating force is greater 2. With speed increase = Resistance increases 3. Forces become balanced coming to Terminal Velocity
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Factors that affect Thinking Distance
Drugs, Alcohol, Reaction time, Tiredness
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Factors that affect Braking Distance
Speed of car, Road Surface, Speed you are going, Mass of car, Quality of Brakes
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Momentum Equation
Momentum = Mass x Velocity
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Change in Momentum Equation
Force = Change in momentum / Time
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## Other cards in this set

### Card 2

#### Front

Speed and Direction

Velocity

### Card 3

#### Front

Gradient=speed, Flat sections= stopped, Straight=constant speed, Steeper=faster

### Card 4

#### Front

How quickly velocity is changing, can be speed, direction or both

### Card 5

#### Front

Acceleration = change in velocity / time taken