I've missed the last 2 lectures for my physics course all I have is a printout of the problem w/o a book to read over. Can someone please answer these questions and provide some feedback as to what/why. Thanks:)
(a) An elevator of mass m moving upward has two forces
acting on it: the upward force of tension, cable and the downward of gravity. When the elevator is accelerating upward, which is greater, T or w?
(b) When the elevator is moving at a constant velocity upward, which is greater, T or w?
(c) When the elevator is moving upward, but the acceleration downward, greater? T or w?
(d) Let the elevator have a mass of 1500 kg and an upward acceleration of 2.5 m/s2. Find T. Is answer consistent with answer to part (a)?
(e) The elevator of part (d) now moves with a constant upward velocity of 10 m/s. Find T. Is your answer consistent with your answer to part (b)?
(f) Having initially moved upward w/a constant velocity, the elevator begins to accelerate downward at 1.5m/s2. Find T
2007-10-28
16:40:42
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1 answers
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asked by
Anonymous
in
Physics