A barrel has a mass of 70 kg, and the height of the dock is 1.2 m. How much work do you do when lifting the barrel

Classical Dynamics of Particles and Systems
5th Edition
ISBN:9780534408961
Author:Stephen T. Thornton, Jerry B. Marion
Publisher:Stephen T. Thornton, Jerry B. Marion
Chapter2: Newtonian Mechanics-single Particle
Section: Chapter Questions
Problem 2.27P: A rope having a total mass of 0.4 kg and total length 4 m has 0.6 m of the rope hanging vertically...
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A barrel has a mass of 70 kg, and the height of the dock is 1.2 m. How much work do you do when lifting the barrel?

Expert Solution
Step 1

Work done(w) = force*displacement

                   w = F*r

                   From Newton's laws of motion

                   F = m*g

             

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