Wednesday

July 30, 2014

July 30, 2014

Posted by **peter** on Tuesday, September 4, 2007 at 9:29pm.

(a) What was its initial speed?

(b) What altitude does it reach?

(c) How long after it was thrown did it pass the window?

(d) After how many more seconds does it reach the street again?

- social studies -
**charnelle**, Tuesday, September 4, 2007 at 9:39pmwhy do communities need laws?

- physics -
**Dooley**, Wednesday, September 5, 2007 at 8:48pmx = 1/2 a t^2 + v0 t + x0

and v = at + v0

(a)needs no translation, but some work: with v=12m/s, solve the velocity equation for the special time t (call it t) when the ball is at the window (in terms of 12m/sec and v0). Don't lose your nerve. Now plug that expression for the t1 into the x equation, with x equal to 27 m, and solve for v0.

(b) find the time, t2, when v=0 (That's at the top of the path.) plug that time into the position equation to find the x value at the highest point.

(c)Now that you know v0, return to the velocity equation in part a and solve for t.

(d)Use the position equation and ask "what time is it when x = 0?"

**Related Questions**

physics - A baseball is seen to pass upward by a window 29 m above the street ...

Physics - A baseball is seen to pass upward by a window 24 m above the street ...

Physics - A. A baseball is seen to pass upward by a window 28.1 m above the ...

Physics Correction - You drop a ball from a window on an upper floor of a ...

physics - two students are on a balcony 20.6 m above the street. One student ...

physics - two students are on a balcony 20.6 m above the street. One student ...

Physics - a tennis ball is thrown vertically upward from the ground and the ...

Physics - A small rock is thrown vertically upward with a speed of 17.0m/s from ...

physics - A small rock is thrown vertically upward with a speed of 13.0 from the...

Physics - A small rock is thrown vertically upward with a speed of 13.0 m/s from...