Question

Hello! Could someone please help me answer all 4 parts of this question reading the directions carefully and showing and explaining all your work in as much detail as possible? Thank you so much!



4. A person uses a block-and-tackle system as shown below (from Wikimedia Commons) to lift a heavy oad Suppose the load has a weight of 1250 N (a) If the person lifts this load slowly at a constant velocity, what force must he exert on the rope to do so? Note the number of ropes touching each part of the setup. (b) Based on the image, if he wants to lift the load 1 m upwards, what is the length of rope he will have to pull to do so? (c) According to your previous answers, how much work is exerted by the person to move the load? (d) Verify that this is the same amount of work needed to lift the load 1 m with a normal pulley system that has the rope attached to the load in only one place. What is the advantage of using a block-and-tackle system? The drawback?

Answer 1

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