History Bookmarks Window Help sapling learning.com lie e PHYS 210 Summer17 BRAUN

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History Bookmarks Window Help sapling learning.com lie e PHYS 210 Summer17 BRAUN Activities and Due Dates l oHW9: Kinetic Energy and Work I 6/2/2017 12:45 PM 8.3/100 B Gradebook. Print calculator Periodic Table Question 3 of 6 Sapling Learning Map Two friends, Joe and Sam, go to the gym together to strength train. They decide to start off with an s. Lying flat on a bench with their arms in an extended position, they sl exercise called flat bench lower (to their chest) and then raise a barbell back to the s position. They start off by using a 34.5 kg Joe is taller than Sam which means Jae's arms are 68.2 cm long while Sams are 61.6 cm. Calculate the work done by Joe, W when he raises the barbell to finish one repetition, The acceleration due to gravity is 9.81 m/s Number Joe

Explanation / Answer

work done =force*distance

for Joe

Work done=34.5*9.81*0.682=230.6 J

for Sam

work done=34.5*9.81*0.616=208.3 J

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