patriciabmc94 patriciabmc94
  • 09-01-2021
  • Physics
contestada

The time it takes a car to attain a speed of 30 m/s when accelerating from rest at 2 m/s2 is?
A) 2 s.B) 15 s.C) 30 s.D) 60 s.

Respuesta :

ChoiSungHyun
ChoiSungHyun ChoiSungHyun
  • 09-01-2021

Explanation:

u = 0m/s

v = 30m/s

a = 2m/s²

Using Kinematics, we have v = u + at.

Therefore t = (v - u) / a

= (30 - 0) / (2) = 15 seconds. (B)

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