HyasathanturnB HyasathanturnB
  • 21-11-2016
  • Physics
contestada

The stopping distance d of a car after the brakes are applied varies directly as the square of the speed r. If a car travelling 70 mph can stop in 270 ft, how many feet will it take the same car to stop whenit is travelling 60 mph?

Respuesta :

andriansp andriansp
  • 23-11-2016
270/70^2  = x/80^2

Cross multiply

270 (6400) = 4900x   

x = 270(6400)/4900

352 and 32/49 feet

Hope this helps


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