A racing car traveling with constant acceleration increases its speed from 10m/s to 50m/s over(adsbygoogle = window.adsbygoogle || []).push({});

a distance of 60 m. How long does this take?

A. 2.0 s

B. 4.0 s

C. 5.0 s

D. 8.0 s

E. The time cannot be calculated since the speed is not constant

I did:

x - x_{o}= 0.5 (V_{o}+ V)(t)

Which is:

60 = 0.5 (60) (t)

Which is:

60 = 30t

t = 2

But, the answer is 4.

What am I doing wrong?

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# My attempt seems right? (Kinematics)

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