# Physics 2 - Forces and their effects

A mindmap covering all the topics involved in Forces and their effects for the P2 exam with AQA. All of the relevant formulas are clear to see in bold and large font.

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- Created by: Jhon Bateman
- Created on: 19-12-12 18:29

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- Power
- Forces and their effects
- Speed is how fast you are going
- Velocity also has a direction
- Acceleration is how quickly velocity is changing
- Acceleration = Change in velocity / Time taken

- Acceleration is how quickly velocity is changing
- Speed = Distance / Time
- Distance time graphs describe something travelling through time and space
- Gradient tells you how fast the object is travelling
- Gradient = Speed
- Steeper the graph, the faster it's going
- Flat means it is stationary

- Gradient = Speed

- Gradient tells you how fast the object is travelling

- Velocity also has a direction
- Gravitational force is the force of attraction between all masses
- Weight and mass are not the same
- Mass is just the amount of stuff in an object
- Not a force
- Measured in kilograms

- Weight is the pull of the gravitational force
- Measured in newtons

- Weight = Mass x Gravitational field strength

- Mass is just the amount of stuff in an object

- Weight and mass are not the same
- Resultant forces
- This is the overall force on a point or object
- The overall effect of these forces will decide the motion of the object

- A resultant force means a change in velocity
- The overall effect of these forces will decide the motion of the object
- Any resultant force will produce acceleration
- Resultant force = mass x acceleration

- This is the overall force on a point or object
- Reaction forces
- They are equal and opposite

- Stopping distances
- Thinking distance is affected by:
- How fast you're going
- Tiredness, drugs and alcohol

- Braking distance is affected by:
- How fast you're going
- How good your brakes are
- How good the tyres are
- Weather conditions, road conditions

- Thinking distance is affected by:
- Work and potential energy
- When a force moves an object through a distance, energy is transferred and work is done
- Work done = Force x Distance
- Gravitational potential energy is energy due to height
- A.K.A. GPE
- Gravitational potential energy = mass x g x height

- Kinetic energy
- Energy of movement
- Kinetic energy = 1/2 x mass x speed squared

- Elastic potential energy
- F = k x e

- Untitled
- Momentum
- The greater the mass and the greater the velocity, the more momentum
- Total momentum before = Total momentum after
- This is the conservation of momentum

- Momentum = Mass x Velocity

- Speed is how fast you are going
- Power is when energy is transferred
- Power = Work done / Time taken

- Forces and their effects

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