In a friendly neighborhood squirt gun contest a participantruns at 7.8 m>s horizontally off the back deck and fires her squirtgun in the plane of her motion but 45° above horizontal. The guncan shoot water at 11 m>s relative to the barrel, and she fires thegun 0.42 s after leaving the deck. (a) What is the initial velocityof the water particles as seen by an observer on the ground? Giveyour answer in terms of the horizontal and vertical components.(b) At the instant she fires, the gun is 1.9 m above the level ground.How far will the water travel horizontally before landing?

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Projectile Motion