P6.1
- Created by: catherinetaylor
- Created on: 09-04-19 11:44
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- Physics On The Move
- There are 1609m in a mile.
- There are 3600s in a hour.
- speed = distance/ time
- Average reaction time of a human is 0.2 seconds.
- Acceleration = change in speed/ time
- Learn the speed of a fast object and a slow object.
- You can then estimate typical speeds of other objects.
- Reaction time is is the time from seeing/ hearing an event and starting to break/ use a stop watch.
- The time it takes before a driver puts their foot on the pedal is called 'thinking distance'.
- Thinking distance = speed x reaction time.
- There are factors which affect thinking distance.
- Alcohol
- Drugs
- Tiredness
- Distractions
- Old Age
- Braking distance is is how far a car travels when braking.
- Stopping distance is the total distance from the moment a problem is detected until the car is stationary.
- Thinking distance + braking distance
- Large deceleration can lead seat belts to cause compression injuries.
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