sci_phy
Stopping Distances
Chapter summary, hard words and model exam answers for ICSE Class 10 Hindi.
Free online summary and notes (ICSE Class 10 Hindi). Read it here, no PDF download needed.
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Physics · CBSE 10 · ICSE 10 · GCSE (AQA, Edexcel, OCR)
Summary
Thinking distance is how far you travel while reacting. Braking distance is how far you travel once the brakes are on.
It grows with speed. Tiredness, alcohol, drugs and phones all lengthen reaction time.
Double the speed and braking distance is four times longer. Wet or icy roads and worn tyres or brakes make it longer still.
A braking force does work against the motion. Bigger force means greater deceleration and a shorter stop, but too much force makes the tyres skid.
Hard words & meanings
| stopping distance | the total distance a vehicle travels from spotting a hazard to a full stop |
| thinking distance | the distance travelled while the driver reacts, before the brakes are applied |
| braking distance | the distance travelled after the brakes are applied until the car stops |
| reaction time | the time between seeing a hazard and applying the brakes |
| deceleration | the rate at which speed decreases, caused by the braking force |
| kinetic energy | the energy a moving object has because of its motion |
| braking force | the backward force from the brakes that slows the vehicle |
| friction | the grip between tyres and road that lets the car slow and stop |
Model exam answers, grammar & audio
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