How long does it take a car to cross a 30.0 m wide intersection after the light turns green, if the car accelerates from rest at a constant 2.00 m/s2.

Question

asked Sep 6, 2021 215k views

1 Answer

Rus Mine · Answer 1 · 2021-09-10T09:18:12+0000

Answer:

5.48s

Step-by-step explanation:

d=30m

a=2m/s²

We also have: d=at²/2, from where we get t=sqrt(2d/a).

t=sqrt(2×30/2)=sqrt(30)=5.48s