A roof tile falls from rest from the top of a building. An observer inside the building notices that it takes 0.19 s for the tile to pass her window, whose height is 1.4 m. How far above the top of this window is the roof?(adsbygoogle = window.adsbygoogle || []).push({});

My train of thought is:

You are given the initial Velocity (Vo=zero m/s), acceleration (-9.8 m/s^2), and the instantaneous velocity of when the tile passes the window (1.4/0.19 = 7.36 m/s)

So you use the instantaneous velocity and plug it into the equation

Vf=Vo+(a)(t) to find the amount of time it took to get to the window.

But if I do that, I get a negative time. I'm not sure where to go here because I can't proceed with a negative time.

After that, my idea was to take the time, and insert it into another equation and find the distance. Even if I neglect that I get a negative time, I still get the incorrect answer after plugging it in to a different equation. So I think I have two problems I need to overcome.

Thanks for the help,

Logan

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# Homework Help: Falling roof tile

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