What does the stopping distance of a car depend on?
The thinking distance and the braking distance.
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What is the resultant force on a vehicle that is travelling at a steady speed?
Zero.
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What are the driving forces of a vehicle that is travelling at a steady speed and therefore the resultant force on it is zero?
The driving forces are equal and opposite to the frictional forces.
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How does vehicle speed affect the braking force needed?
The faster the speed of a vehicle, the bigger the deceleration needed to stop it in a particular distance, so the biggest the braking force needed.
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What is the stopping distance of a vehicle?
The distance it travels during the driver's reaction time (the thinking distance) plus the distance it travels under the braking force (the braking distance).
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When may the thinking distance increase?
If the driver is tired or under the influence of alcohol or drugs.
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When may the braking distance increase?
If the roads are poorly maintained or there is bad weather conditions or if the car is in poor condition, for example worn tyres or worn brakes will increase braking distance.
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What is the resultant force on a car travelling at a steady speed on a straight horizontal road?
Zero.
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What is the relationship between stopping distance, thinking distance and braking distance?
**REMEMBER THAT THE REACTION TIME DEPENDS ON THE DRIVER WHEREAS THE BRAKING DISTANCE DEPENDS ON THE ROAD, WEATHER CONDITIONS AND THE CONDITION OF THE VEHICLE**
**
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Other cards in this set
Card 2
Front
What does the stopping distance of a car depend on?
Back
The thinking distance and the braking distance.
Card 3
Front
What is the resultant force on a vehicle that is travelling at a steady speed?
Back
Card 4
Front
What are the driving forces of a vehicle that is travelling at a steady speed and therefore the resultant force on it is zero?
Back
Card 5
Front
How does vehicle speed affect the braking force needed?
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