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A 4 kg mortar shell is fired at an angle of 60° above the horizontal with...

A 4 kg mortar shell is fired at an angle of 60° above the horizontal with an initial speed of v0. At its highest point its speed is 120 m/s. (a) At this highest point, what is the change in its gravitational potential energy relative to its initial launch position? Neglect air resistance? (b) How far above the launch point did the mortar travel to get to its highest point? Neglect air resistance

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