According to the Guinness Book of World Records, the longest home run ever measured was hit by Roy "Dizzy" Carlyle in a minor-league game. The ball traveled 188 m (618 ft ) before landing on the ground outside the ballpark. Assuming that the ball's initial velocity was 45∘ above the horizontal, and ignoring air resistance, what did the initial speed of the ball need to be to produce such a home run if the ball was hit at a point 1.0 m (3.3 ft ) above ground level? Assume that the ground was perfectly flat.

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Q: B

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Projectile Motion