Monday

October 20, 2014

October 20, 2014

Posted by **ray** on Sunday, September 9, 2012 at 12:37am.

- physics -
**drwls**, Sunday, September 9, 2012 at 3:59amSolve this equation for t:

height = 0 = 9.31 + 3.06 t - (g/2) t^2

= - 4.9 t^2 + 3.06 t + 9.31

There will be two answers since this is a quadratic equation. Take the positive one.

t = (-1/9.8)[-3.06 - sqrt[(3.06)^2 + 182.5)]

= 1.726 s

**Answer this Question**

**Related Questions**

Physics - A hot-air balloon is rising upward with a constant speed of 2.20 m/s. ...

physics - A hot-air balloon is rising upward with a constant speed of 2.00 m/s. ...

physics - A hot-air balloon is rising upward with a constant speed of 3.93 m/s. ...

physics - A hot-air balloon is rising upward with a constant speed of 2.22 m/s...

physics - A hot-air balloon is rising upward with a constant speed of 2.50 m/s. ...

Physics - A hot-air balloon is rising upward with a constant speed of 2.50 m/s. ...

Physics - A hot-air balloon is rising upward with a constant speed of 2.83 m/s. ...

physics - A hot-air balloon is rising upward with a constant speed of 2.95 m/s. ...

Physics - A hot-air balloon is rising upward with a constant speed of 2.21 m/s. ...

Physics - A hot-air balloon is rising upward with a constant speed of 2.27 m/s. ...