My Dream car Design and Safety

Introduction Shnira wants a stylish “cool” car for her 17th birthday Her parents want her to get a “safe” car But what constitutes a “safe” car? Can a “safe” car also be stylish?

Lexus RX 350 Tested vehicle 2016 Lexus RX 350 4-door 4wd Weight 4,431 lbs. Side airbags front and rear head curtain airbags and front and rear seat-mounted torso airbags Wheelbase 110 in. Length 193 in. Width 75 in. Engine 3.5 L V6 EPA ratings 19 mpg city / 26 mpg highway

Lexus RX 350 Safety Features Side airbags: front and rear head curtain airbags and front and rear seat- mounted torso airbags Rollover sensor: designed to deploy the side curtain airbags in the event of an impending rollover Driver and front passenger knee airbags: separate airbags in the lower instrument panel designed to minimize knee injuries in frontal crashes Electronic stability control Antilock brakes Daytime running lights

Physics Calculations Momentum (p) = Mass (m) x Velocity (v) Mass: 4,431 lbs. = 2,010 kg Velocity: 60 mph = 96 kmph 2010 x 96 = 192960 kg * km/h Impulse (J) = Force (N) x Time (s) Acceleration = 20 m/s2 Force = Mass x acceleration 2010 x 20 = 40,200 N Impulse = 40,200 x 10 s = 402,000 N * s

Crashworthiness Results Small overlap front Good Moderate overlap front Side Roof strength Head restraints & seats

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