Posted by **meagan** on Wednesday, September 21, 2011 at 9:42pm.

A projectile of mass 0.539 kg is shot from a

cannon. The end of the cannon’s barrel is

at height 6.4 m, as shown in the figure. The

initial velocity of the projectile is 9 m/s .

How long does it take the projectile to hit the

ground?

Answer in units of s

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