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In a children’s story, a princess trapped in a castle wraps a message around a rock...

In a children’s story, a princess trapped in a castle wraps a message around a rock and throws it from the top of the castle. Right next to the castle is a moat. The initial velocity of the rock is 12 m/s[42° above the horizontal]. The rock lands on the other side of the moat, at a level 9.5m below the initial level. Air resistance is negligible. Calculate the rock’s time of flight? Calculate the width of the moat. Determine the rock’s velocity on impact with the ground.
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