Physics Triple Award P2 Revision
- Created by: pixar
- Created on: 01-12-14 09:09
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- Physics P2
- Slowing Down and Stopping
- Thinking Distance
- The thinking distance is the distance traveled before the drover starts breaking
- Stoppng distance is the thinking distance plis the breaking distance
- The thinking distance increases with speed although not as much for the breaking dostance
- Things that affect the thinking distance
- Tiredness
- Distractions
- Alcohol
- Drugs
- Thinking Distance
- Mains Plugs
- The structure of an electric cable
- The cables used in a home has 3 main parts:
- 2) Coloured inner insulation
- The colour indicates which wire is which and insulates the other copper within the wires
- 1) stranded copper wire
- This s the core of the cable as copper is a very good conductor
- The bundle of copper wires can be bent and coiled without breaking
- This s the core of the cable as copper is a very good conductor
- 3) Outer insulation
- This is stiffer and harder than the inner inslation
- This provides extra protection
- This is stiffer and harder than the inner inslation
- 2) Coloured inner insulation
- The cables used in a home has 3 main parts:
- Wiring a Plug
- The blue wire is the neutral wire
- This is connected to the neutral pin
- The green and yellow wire is the earth wire
- This is connected to the earth pin
- The brown wire is the live wire
- This is connected to the fuse
- Rules
- Always check the correct wire is connected to the right pin
- The wires can't be streched
- The screws on the pins need to grip the wire firmly
- No bare copper should be visible
- The blue wire is the neutral wire
- The structure of an electric cable
- Fuses, Earth and Circuit Breakers
- Fuses
- Fuses are small safety devices that contains a length of wire
- The wire melts if the current gets too high in a circuit breaking the flow of electricity
- Fuses are small safety devices that contains a length of wire
- Circuit Breakers
- circuit breakers are similar to fuses but are more sensitive and work faster
- It breakes the circuit after it detects a difference in current between the live and neutral wires
- Earth
- The earth wire is a low resistance path for the electric current to flow through
- Fuses
- Slowing Down and Stopping
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