Homework Help: phisics

Posted by Shanice on Monday, October 10, 2011 at 10:32pm.

A projectile is fired horizontally from a gun that is 45m above flat ground, emerging from the gun with speed 250m/s
How long does the projectile remain in the air? At what horizontal distance from the firing point does it strike the ground?.What is the magnitude of the vertical component of its velocity as it strikes the ground?

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