Factors Affecting Stopping Distances and Speed Impact
Learn about the factors influencing stopping distances, how speed and mass affect stopping distance, and ways to change velocity. Discover what influences stopping time and distances, including road conditions and vehicle maintenance. Explore how speed and mass influence stopping distances in various scenarios.
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Presentation Transcript
Stopping distances * ** *** To name some factors that could affect stopping times/distances To describe how stopping distance changes with speed Explain how speed and mass affect stopping distance
Forces on the road For a car travelling at a constant velocity the resultant force is zero. velocity * ** *** To name some factors that could affect stopping times/distances To describe how stopping distance changes with speed Explain how speed and mass affect stopping distance
Changing the velocity How can the driver change the velocity? * ** *** To name some factors that could affect stopping times/distances To describe how stopping distance changes with speed Explain how speed and mass affect stopping distance
How long will it take to stop? The braking force depends on the speed of the vehicle and the mass of the vehicle F=ma At high speeds the deceleration (negative acceleration) is higher so braking force is higher The greater the mass the greater the braking force * ** *** To name some factors that could affect stopping times/distances To describe how stopping distance changes with speed Explain how speed and mass affect stopping distance
Stopping distance Include thinking time and braking time Highway code talks about 2 seconds to think * ** *** To name some factors that could affect stopping times/distances To describe how stopping distance changes with speed Explain how speed and mass affect stopping distance
* ** *** To name some factors that could affect stopping times/distances To describe how stopping distance changes with speed Explain how speed and mass affect stopping distance
What affects stopping distance? Tiredness Alcohol and drugs The speed The road conditions (eg ice and rain) Poorly maintained vehicles (bald tyres) * ** *** To name some factors that could affect stopping times/distances To describe how stopping distance changes with speed Explain how speed and mass affect stopping distance
Your task To design a poster to encourage drivers to be safe Include some science (F=ma) to back up your argument You might want to think of your audience and how you will have impact thinking time acceleration speed stopping time deceleration mass brakes force friction * ** *** To name some factors that could affect stopping times/distances To describe how stopping distance changes with speed Explain how speed and mass affect stopping distance
