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zimovet [89]
4 years ago
10

How long does it take a car to cross a 30 m wide intersection after the light turn green, if

Physics
1 answer:
Makovka662 [10]4 years ago
8 0

Answer:

t=4.47s

Explanation:

Hello,

In this case, since the car starts from from rest whereas the initial velocity is zero, we can compute the time via the following equation:

d=v_0*t+\frac{1}{2}at^2\\\\d=\frac{1}{2}at^2

Which is solving by applying square root:

3.00t^2=2*30\\\\t=\sqrt{\frac{2*30m}{3.00m/s^2} }\\ \\t=4.47s

Best regards.

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2 years ago
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Q=3.47\times 10^{-15}\ C

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