Question

For typical rubber-on-concrete friction, what is the shortest time in which a car could accelerate from 0 to 70 mph? suppose that μs=1. 00μs=1. 00 and μk=0. 80μk=0. 80

Answer 1

The shortest time in which a car could accelerate from 0 to 70 mph is 3.193 seconds.

To find the answer, we have to know more about the friction.

How to find the shortest time?

• We have the expression for final velocity as,

                          $v=u+at$

• It is given in the question that,

                        $v=70mph=31.29m/s\\1mile=1609.3m,1hour=3600s\\u=0\\k_s=1\\k_k=0.8$

• It is given that; the car could accelerate from 0 to 70mph. Thus, acceleration will be,

                    $a=g*k_s=9.8*1=9.8m/s^2$

• Thus, the shortest time will be,

                    $t=\frac{v-u}{a} \\t=\frac{31.29}{9.8}=3.193s$

Thus, we can conclude that, the shortest time in which a car could accelerate from 0 to 70 mph is 3.193 seconds.

Learn more about the shortest time here:

brainly.com/question/3017271

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