Question

A brand new corvette can go from 0 to 85 miles per hour in 4.8 seconds.

Answer 1

Answer:

(A) 7.9 m/s^{2}  

(B) 19 m/s

(C) 91 m

Explanation:

initial velocity (U) = 0 mph = 0 m/s

final velocity (V) = 85 mph = 85 x 0.447 = 38 m/s

initial time (ti) = 0 s

final time (t) = 4.8 s

(A) acceleration = $\frac{V-U}{t}$

         = $\frac{38-0}{4.8}$ = 7.9 m/s^{2}  

(B) average velocity = $\frac{V+U}{2}$

     =$\frac{38+0}{2}$ = 19 m/s

(C) distance travelled (S) = ut + $0.5at^{2}$

  =  (0 x 4.8) + $0.5 x 7.9 x 4.8^{2}$ = 91 m