Question

A car initially at rest can accelerate at 7 m/s2. How long will it take the car to reach 60 m/s?

Answer 1

Answer:8.57sec.

Explanation: First you take the Acceleration Formula which is a=(vf-vi)/t and plug everything in to where you get 7m/s^2= (60-0)/t. now you take that and rearrange it to t=60/7 which finally comes to your answer of 8.57sec.

Answer 2

Answer:

The answer to your question is      t = 8.6 s

Explanation:

Data

Initial velocity = vo = 0 m/s

acceleration = a = 7 m/s²

time = t = ?

final velocity = vf = 60 m/s

Formula

             vf = vo + at

-Solve for t

             at = vf - vo

               t = (vf - vo) / a

-Substitution

               t = (60 - 0) / 7

-Simplification

               t = 60 / 7

-Result

                t = 8.6 s