Homework Help: Physics

Posted by Anna on Sunday, November 7, 2010 at 9:16pm.

a rifle is fried from the top of a building 220 meters high with an initial velocity of 425 m/s at an angle of 12.0 degrees above the horizontal.
a. how long will it take for the bullet to reach the ground?
b. how far from the base of the building will the bullet strike the ground?
c. what will be the velocity of the bullet just as it reaches te ground?

Physics - ANna, Monday, November 8, 2010 at 10:13pm
a. you do v^2 = vi^2 = 2aD
then u do V= vi + at to get time as 20.3
b. D= Vox*T (415.7)(20.3) = 8440m
c.430m/s at 14.8* downward

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