Question

Take-Home 31 Directions: Do all work on separate paper. Due date is the beginning of class on The time the assignment is due is the BEGINNING OF CLASS. Late work will not be accepted! Submit the assignment early so you are not late. Do not put work on this paper, provide all work in a neat and orderly manner on your own paper, fasten this page to the top. You are part of an engineering team designing a crane for use in a warehouse. The crane has a large hook, weighing 30 pounds, that is lifted by a thick cable through a pulley system. Due to the extreme weights being lifted, the cable is designed to endure the forces exerted by lifting weights off the ground, the cable has density of 5 pounds per foot. The crane support will be built at a height of 100 feet above the ground. a) Without any load being lifted, how much work is done lifting the entire cable (and hook) from the ground to the crane support? b) Without any load being lifted, how much work is done lifting the cable (and hook) to a height of 40 feet? c) A 5 horsepower motor is used to lift the cable/hook (1 horsepower = 500 ft-lb of work per second). How long will it take to lift the cable/hook from the ground to the crane support? d) A particular job being completed will involve moving crates that weigh 450 pounds. The crates have to be lifted to a specific height in order to clear other obstacles resting on the ground. Based on the dimensions of the crate, the hook must be 50 feet off the ground to achieve the proper clearance. How much work is done lifting one crate to this clearance? e) How long will it take the motor to lift a crate to the clearance height? f) To increase production during the 8-hour work day, the manager has requested the lifting time be reduced to 10 seconds per crate. What horsepower motor would be necessary to lift a crate to the clearance height in 10 seconds? B) The Occupational Safety and Health Administration, OSHA, has determined that the current gauge cable isn't strong enough for long-term use. Testing has shown that the current wire has a high chance of failure after about 6 months of use. Due to these findings OSHA standards state that any jobs requiring cargo heavier than 250 pounds must use cable with a density of 12 pounds per foot. In addition, the strength of the hook must be increased to a larger size that has a weight of 44 pounds. What horsepower motor will be required to maintain a 10 second lift time?

its chapter 6.4 or something work problems

This is a Calc question you're supposed to read the text next to the picture and answer questions from A to E

Answer 1