Posted by hy on Sunday, October 24, 2010 at 2:10pm.
A rocket is fired at a speed of 75.0 m/s from ground level, at an angle of 64.7¡ã above the horizontal. The rocket is fired toward an 11.0 m high wall, which is located 25.0 m away. The rocket attains its launch speed in a negligibly short period of time, after which its engines shut down and the rocket coasts. By how much does the rocket clear the top of the wall?

physics  bobpursley, Sunday, October 24, 2010 at 2:18pm
Horizontal
distance=horzvelocity*time
time= distance/velocity= 25/(75cos64.7)
figure time, then put it here.
Vertical:
h=75*sin64.7t4.9t^2
how much higher is h than 11 m.

physics  hy, Sunday, October 24, 2010 at 2:33pm
thanks

physics  liz, Sunday, January 16, 2011 at 3:50pm
where does the 4.9 come from?

physics  tom, Wednesday, September 21, 2011 at 2:18am
h=49.62m
49.62m11m for the wall
clear of the top = 38.62
4.9 its from multiplying 1/2(9.8m/s^2)
1/2(ay)
Answer This Question
Related Questions
 physics  A rocket is fired at a speed of 92.0 m/s from ground level, at an ...
 Physics  A rocket is fired at a speed of 75.0 m/s from ground level, at an ...
 physics  A rocket is fired at a speed of 66.0 m/s from ground level, at an ...
 physics  A rocket is fired at a speed of 75.0 m/s from ground level, at an ...
 Physics  A rocket is fired at a speed of 96.0 m/s from ground level, at an ...
 Physics  A rocket is fired at a speed of 50.0 m/s from ground level, at an ...
 physics  A rocket is fired at a speed of 54.0 m/s from ground level, at an ...
 physics  A rocket is fired at a speed of 91.0 m/s from ground level, at an ...
 physics  A rocket is fired at a speed of 91.0 m/s from ground level, at an ...
 physics  A rocket is fired at a speed of 70.0 m/s from ground level, at an ...
More Related Questions