Forces on a Vehicle
- Created by: Annie
- Created on: 11-12-13 18:23
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- Forces on a Vehicle
- The stopping distance of a car depends on two factors - thinking distance and braking distance.
- Under normal driving conditions, the thinking and braking distance depend on the speed of the car.
- On A Car moving at a steady speed..
- Gravity pulls down on the car
- The reaction force from the road pushes up on the wheels
- The driving force from the engine pushes the car along
- There is friction between the road and the tyres
- There is friction between the road and the tyres
- Speeding Up
- Gravity and the reaction force from the road are balanced – they are equal and opposite
- The driving force from the engine is greater than the resistive forces (friction between the road and the tyres, and air resistance acting on the body of the car)
- Slowing Down
- The driving force from the engine must be reduced
- The resistive forces must be increased
- Thinking Distance
- stopping distance = thinking distance + braking distance
- The stopping distance of a car depends on two factors - thinking distance and braking distance.
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