A child saw a skunk in a hole of a tree, standing 2.5m away. The child attempted to throw a pebble into the hole, but missed with a speed of 11m/s. Angle of elevation is 75 degrees, what was the Vfy of the pebble?

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  1. Assuming the pebble missed the tree entirely, and fell onto level ground, the final downward speed is the same as the initial upward speed.

    11 * sin75

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