Why get B?

3 Responses to Why get B?

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   matt says:

   March 22, 2012 at 6:40 pm

   
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   Why spell it like breaks. Because no race car.

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   JB says:

   April 11, 2012 at 1:34 am

   
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   It’s been a while… but given the data provided, I’m guessing there need to be a resistive force of 298N?

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     MiG says:

     April 18, 2012 at 4:41 am

     
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     Hehe, not quite. 13461 N.
     For constant acceleration a=V/t
     Then F=ma
     F = 2000 * 35/5.2 = 13461 N

     It’s good to sense check answers. You could generate a friction force 298 N by forcing a piece of 2×4 against the ground, but you probably know that there’s no way you could stop a heavy sedan going 126 km/h in 5.2 s with that.

     Anyway, what sort of idiot relates a lack of brakes to a race car? If you’re just engine braking, you’re slow.

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