Created by StemPy LabAn athlete runs half a lap of a circular track of radius , from one end of a diameter to the other, in . What are her average speed and the size of her average velocity?
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← A swimmer can swim at 3 m/s in still water. She crosses a river 60 m wide that flows at 5 m/s, faster than she can swim. She cannot land directly opposite, but by choosing her direction well she lands as little downstream as possible. How far downstream is that?In a computer game, a ball starts from the origin with velocity (6î + 8ĵ) m/s and has a constant acceleration (-2ĵ) m/s². After how many seconds is its velocity horizontal? ____ →
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