# Physics

posted by .

A window is 1.50m high. A stone falling from above passes the top of the window with a speed of 3m/s. When will it pass the bottom of the window?

• Physics -

x = x0 + v0*t + 1/2*a*t^2

x0=1.5 v0=-3 a=-10 (or something close, depending on what you're told to use in your class).

You want the time for when x=0 (where 0m = the bottom of the window).

0 = 1.5 - 3 x t - 5 x t^2

1.5 = 3xt + 5xt^2

0=5t^2 +3t -1.5

You use the quadratic equation and you find : t ~= 0.3245

## Similar Questions

1. ### physics

A stone is observed falling past a small window 1 meter tall in 0.2 seconds. how fast is it moving as it passes the bottom of the window?
2. ### Physics

A stone, initially at rest, is dropped from the top of a building. On its way down, it passes a window that is 2.52m tall. It takes 0.134 seconds to pass the window. From how far above the top of the window was the stone dropped?
3. ### physics

A falling stone takes 0.320 s to pass a window 2.30 m high. From what height (in meters) above the top of the window did the stone fall?
4. ### physics

A falling stone takes 0.320 s to pass a window 2.30 m high. From what height (in meters) above the top of the window did the stone fall?
5. ### physics

A pot with a flower falls out of a window box in a tall apartment building. It passes the top of a particular window with a velocity of -1.7 m/s. It passes the bottom of this window 0.2800 s later?
6. ### physics

A stone is dropped from edge of a roof and is observed to pass a window, vertically below it. The stone takes 0.1 sec to fall between the top and bottom of the window. If the window is of 2 m height, how far is the roof above the top …
7. ### physics

A window is 50 long. A stone is falling from a height of 40 cm above the window.find the time taken by the stone to cross the window.
8. ### physics

A window is 50 long. A stone is falling from a height of 40 cm above the window.find the time taken by the stone to cross the window.
9. ### physics

a brick is dropped form the roof of a building. On the way down it passes a 2m high window and is observed to pass from the top to the bottom of the window in 0.25s. (a) How fast was it moving when it passed the top of the window?
10. ### physics

A falling stone take 0.2s to fall post a window with. Hight 1m from how far above the top of window stone dropped

More Similar Questions