A person walks up a stalled l5-m-long escalator in 90s. When standing on the same escalator, now
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A person walks up a stalled l5-m-long escalator in 90s. When standing on the same escalator, now moving, the person is carried up in 60s. How much time would it take that person to walk up the moving escalator? Does the answer depend on the length of the escalator?
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When the escalator is stalled the speed of the person is v lt where is the lengt...View the full answer
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Related Book For 
Fundamentals of Physics
ISBN: 978-0471758013
8th Extended edition
Authors: Jearl Walker, Halliday Resnick
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