Posted by Anonymous on Tuesday, October 9, 2012 at 2:30pm.
A rocket is fired at a speed of 70.0 m/s from ground level, at an angle of 40.0 ° above the horizontal. The rocket is fired toward an 14.0m high wall, which is located 21.0 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? I keep getting 1.64 m but its not the correct answer

physics  Elena, Tuesday, October 9, 2012 at 2:51pm
t=x/v(0x) = x/v(0) •cosα=
=21/70•cos40°=0.39 s.
h=v(oy) •t  gt²/2 =
=v(o) •sinα•t  gt²/2=
=70•sin40°•0.39 – 9.8•0.39²/2 =16.8 m
Δh=16.814 = 2.8 m.

physics  Anonymous, Tuesday, October 9, 2012 at 2:55pm
apparently that is incorrect as well according to the assignment program:/
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