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Sagot :
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,
[tex]v=u+at[/tex]
- It is given in the question that,
[tex]v=70mph=31.29m/s\\1mile=1609.3m,1hour=3600s\\u=0\\k_s=1\\k_k=0.8[/tex]
- It is given that; the car could accelerate from 0 to 70mph. Thus, acceleration will be,
[tex]a=g*k_s=9.8*1=9.8m/s^2[/tex]
- Thus, the shortest time will be,
[tex]t=\frac{v-u}{a} \\t=\frac{31.29}{9.8}=3.193s[/tex]
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:
https://brainly.com/question/3017271
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