Posted by **steve** on Tuesday, October 4, 2011 at 11:19am.

A projectile of mass 0.777 kg is shot from a cannon, at height 6.6 m, as shown in the ﬁgure, with an initial velocity vi having a horizontal component of 7.8m/s.

The projectile rises to a maximum height of ∆y above the end of the cannon’s barrel and strikes the ground a horizontal distance ∆x past the end of the cannon’s barrel.

----Find the vertical component of the initial

velocity at the end of the cannon’s barrel,

where the projectile begins its trajectory. The

acceleration of gravity is 9.8 m/s

2

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