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Pani-rosa [81]
4 years ago
15

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

Physics
2 answers:
LUCKY_DIMON [66]4 years ago
7 0

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.

strojnjashka [21]4 years ago
5 0

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

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Explanation:

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Explanation:

The given data is as follows.

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     Maximum speed (v_{m}) = 0.350 m/s

Formula for angular frequency is as follows.

          \omega = \sqrt{\frac{{k}{m}}

    \omega = \sqrt{\frac{{8}{0.160}}

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                  A = \frac{\nu}{\omega}

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Formula for mechanical energy is as follows.

            M.E = \frac{1}{2}kA^{2}

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            M.E = \frac{1}{2}kA^{2}

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Thus, we can conclude that kinetic energy of the puck when the displacement of the glider is 0.0300 m is 6.2 \times 10^{-3} J.

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