Stopping safely (Edexcel GCSE Physics Combined Science): Flashcards
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15 cards from this deck
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Practise the cards
15 cards from this deck
Formula for stopping distance
Formula for stopping distance
What is thinking distance?
What is thinking distance?
Distance travelled during driver's reaction time
What is braking distance?
What is braking distance?
Distance travelled while brakes applied until car stops
Effect of faster speed on stopping distance
Effect of faster speed on stopping distance
Faster speed means more space needed to stop safely
How wet/icy roads affect braking distance
How wet/icy roads affect braking distance
Decrease friction, cause skidding, increase braking distance
How worn tyres affect braking distance
How worn tyres affect braking distance
Lower friction, more skidding, increase braking distance
How worn brakes affect braking distance
How worn brakes affect braking distance
Reduce friction & braking force, increase braking distance
Braking distance at 30mph
Braking distance at 30mph
14m
Typical driver reaction time
Typical driver reaction time
Approximately 1 second
Thinking distance relationship to speed
Thinking distance relationship to speed
Directly proportional to speed
Braking distance relationship to speed
Braking distance relationship to speed
Squared relationship with speed
Effect on braking distance if speed doubles
Effect on braking distance if speed doubles
Braking distance quadruples
Energy transfer when car brakes
Energy transfer when car brakes
Kinetic energy to thermal energy in brakes
Formula for thinking distance
Formula for thinking distance
Estimated mass of a car
Estimated mass of a car
~1000 kg