Posted by **Mos Def** on Sunday, August 8, 2010 at 7:26am.

How is escape velocity independent of angle of projection??

I mean i expect it to be DEPENDENT on the angle of projection cuz only vertical component of initial velocity helps a body to overcome gravitational force. So only the vertical component of velocity can behave as escape velocity. And angle does matter there.. PLzzzz help me out..

- Physics -
**drwls**, Sunday, August 8, 2010 at 8:24am
Assuming there is no atmosphere and the projectile is not aimed below the horizon (i.e. at the ground), the escape velocity IS independent of launch angle. Consider the situation from an energy point of view. If there is enough in initial kinetic energy so that Ve^2/2 = MG/R, where M is the Earth's mass and R is its radius, then when r = infinity, the total energy

(m/2)v^2 - mMG/r

is zero, and the projectile can escape. The horizontal component of velocity at launch IS used to overcome gravitational attraction at large distances.

## Answer This Question

## Related Questions

- Physics Honors - Jason Kendall throws a baseball with a horizontal component of ...
- projectile motion - A missile is fired upwards from the top of a cliff in a ...
- Physics - A projectile, fired with unknown initial velocity, lands 20.8 s later ...
- Physics - A projectile, fired with unknown initial velocity, lands 18.4 s later ...
- Physics - A projectile, fired with unknown initial velocity, lands 18.4 s later ...
- physics - A projectile, fired with unknown initial velocity, lands 18.4 s later ...
- physics - Which parameter of a projectile depends on the horizontal as well as ...
- Physics - A projectile, fired with unknown initial velocity, lands 18.4 s later ...
- Physics - A projectile is fired at an angle of 60degree with the horizontal and ...
- Physics - A projectile is shot from the ground at an angle of 60 degrees with ...

More Related Questions