Ben and Jack are shopping in a department store. Ben
Chapter , Problem 63(choose chapter or problem)
Ben and Jack are shopping in a department store. Ben leaves Jack at the bottom of the escalator and walks east at a speed of 2.4 . Jack gets on the escalator, which is inclined at an angle of 37 above the horizontal, and travels eastward and upward at a speed of 2.0 . (a) What is the velocity of Ben relative to Jack? (b) At what speed should Jack walk up the escalator so that he is always directly above Ben (until he reaches the top)?
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