Tuesday

October 21, 2014

October 21, 2014

Posted by **Jeesha** on Tuesday, August 19, 2014 at 10:34pm.

Sketch the situation and decompose the initial velocity vector. WHat are the initial values for Vx and Vy?

Calculate the maximum height achieved by the rock

calculate the range

calculate the rock's velocity (magnitude and direction) 2.0 seconds after the launch

- Physics -
**Henry**, Wednesday, August 20, 2014 at 8:53pmVo = 25m/s[30o]

Vx = 25*cos30 = 21.65 m/s.

Vy = 25*sin30 = 12.50 m/s.

h=(V^2-Vy^2)/2g=(0-(12.5^2)/-19.6=7.97 m

Range = Vo^2*sin(2A)/g

Range = 25^2*sin(60)/9.8 = 55.23 m.

V=Vy + g*t = 12.50 + (-9.8*2) = -7.1m/s

21.65 - 7.1i=22.78m/s[-18.16o]=Velocity

2 seconds after the launch.

Note: The hor. component of velocity

does not change.

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