Question

Just looking for an answer for mh, W, % and the last part

A 500 g mass (My) is hung from a pulley system of two triple pulleys such as we used in laboratory. Each of the two triple pulley set has a mass of 68.7 g. if the friction in the pulleys were negligible what would be the minimum mass (mp) needed to keep the 500 g mass (Mb) stationary? mh- 9. If the friction in the pulleys were negligible the hanging mass (ma) needed to lift the 500 g mass at constant speed would be the same asthe correct answer to the first question. In a real system there wili be some friction in each pulley. Therefore to hold the 500 g mass stationary the minimum mass (mh) needed would be less than the correct answer to the first question. In a real system there will be some friction in each pulley. Therefore to lift the 500 g mass at a constant speed the hanging mass (mh) would be more than the correct answer to the first question Suppose that in laboratory you found that it took 122 g of hanging mass (mn)to raise the 500 g at a constant speed. How much work would be requires to lift the the 500 g one meter? What would bo the efficiency of that process? Efficiency- The efficiency could be improved by using pulleys with less friction and lifting less than 500g using a smaller hanging mass using pulleys with less mass lifting at a slower speed

Answer 1

6 T 68-找1-3) M b 6 二0929 N 6 ⓒleu han Ane (d) more than Au .

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