Car Design

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  • Created by: Jo Wells
  • Created on: 28-12-12 20:15
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  • Car Design
    • Brakes
      • Work against the kinetic energy of the car
        • Transfer it to heat & sound
      • Regenerative brakes put the motor into reverse (not heat energy)
        • Slowing the wheels
        • Motor acts as an electric generator, converting kinetic into electrical energy = stored as chemical energy in vehicle's battery
        • Store energy, rather than waste it
    • Designed to convert KE safely in a crash
      • So people in car DON'T experience huge forces
      • Crumple Zones (at front & back)
        • KE is converted (into other energy) by the car body as it changes shape
        • Increase impact time, thus decreasing force produced
      • Side Impact Bars (strong metal tubes in door panels)
        • Help direct KE away from people to other areas
      • Seat Belts
        • Stretch, increasing time taken to stop
        • Some KE of wearer is also absorbed into belt
      • Air Bags
        • Slow person down more gradually
        • Prevent person hitting surfaces in car
    • Power Ratings
      • More powerful engine = more energy it transfers from fuel every second (FASTER)
      • Typical small car = 50kW & sports car = 100kW
    • Aerodynamic = minimises air resistance
      • More aerodynamic = higher top speed


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