Mathematics, 13.05.2021 22:30, yurlgurllmay
Kate needs to lift a 500 N box of books onto a library shelf that is 3 meters high. She decides that the best machine to help her would be a set of fixed and movable pulleys known as a block and tackle. She applies an effort force of 100 N to the rope of the pulley and finds that she has to pull 18 meters of rope to get the box raised to the height of the shelf. What is the efficiency of the pulley system?
Answers: 3
Mathematics, 21.06.2019 20:30, cgarnett5408
Find the magnitude, correct to two decimal places, made by each of the following with positive direction of the x axis a) y= x the answer is 45° but i don’t know how
Answers: 2
Mathematics, 21.06.2019 22:50, rileyeddins1010
Aweekly newspaper charges $72 for each inch in length and one column width. what is the cost of an ad that runs 2 column inches long and 2 columns wide? its not 288
Answers: 1
Mathematics, 22.06.2019 00:00, mikemurray115
Triangles abc and dfg are given. find the lengths of all other sides of these triangles if: b ∠a≅∠d, ab·dg=ac·df, ac=7 cm, bc=15 cm, fg=20 cm, and df-ab=3 cm.
Answers: 1
Kate needs to lift a 500 N box of books onto a library shelf that is 3 meters high. She decides that...
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