Question: A rock thrown with speed 10.5 m/s and launch angle 30.0 (above the horizontal) travels a horizontal distance of d = 19.5 mm before hitting

A rock thrown with speed 10.5 m/s and launch angle 30.0 (above the horizontal) travels a horizontal distance of d = 19.5 mm before hitting the ground. From what height was the rock thrown? Use the value g = 9.800 m/s2m/s2 for the free-fall acceleration.Find the height yi from which the rock was launched.

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