Posted by **Tee** on Thursday, October 28, 2010 at 11:03pm.

Bill kicks a rock off the top of his apartment building. It strikes a window across the street 18m away. The acceleration of gravity is 9.8 m/s sqaured.

If the window is 12 m below the position where bill contacted the rock, how long was it in the air?

Answer in units of s.

- Physics I -
**Anonymous**, Monday, October 20, 2014 at 10:35pm
38.5

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