Wednesday

October 1, 2014

October 1, 2014

Posted by **Ligu** on Friday, September 24, 2010 at 3:43am.

- physics -
**MathMate**, Friday, September 24, 2010 at 9:52amIt hits ground with 45° angle when the vertical velocity, vy, is the same as the horizontal velocity, vx, which equals u (initial velocity) if the projectile is fired horizontally and ignoring air-resistance.

vx=u

Let H=given height of cliff

vy²-0²=2gH

vy²=2gH

since vy=u,

u²=2gH

u=√(2gH)

**Answer this Question**

**Related Questions**

Physics - a) A cannonball is fired horizontally from the top of a cliff. The ...

physics - A projectile is fired at an angle of 30ᵒ above the horizontal ...

physics - Atop a cliff, a projectile is fired horizontally with an initial speed...

physics - Atop a cliff, a projectile is fired horizontally with an initial speed...

pre-calc - analyzing the motion of a projectile: a projectile is fired from a ...

science - A projectile is fired with an initial speed of 120m.s' at an angle of ...

science - A projectile is fired with an initial speed of 120m.s' at an angle of ...

physics - A cannonball is fired horizontally from the top of a cliff. The ...

physics - a projectile with a muzzle velocity of 550 m/s is fired from the a gun...

Physics - Someone posted the question below, stating that they knew the answer ...