In the system shown in the figure, suppose the block has a mass of 3.4 kg...
In the system shown in the figure, suppose the block has a mass of 3.4 kg , the spring has a force constant of 550 N/m , and the coefficient of kinetic friction between the block and the floor is 0.19. Find the work done on the block by the spring and by friction as the block is moved from point A to point B along path 2.
Homework Answers
Work done by spring = -1/2 * k* x2
Work done by spring = -1/2 * 550 * 0.022
Work done by spring = -0.11 J
The negative sign is due to the fact that work and force are in opposite direction.
--------------------------------------------------------
Work done by friction = -umgd
here d = 0.02 + 0.04 (total distance moved)
so,
Work done by friction = -0.19 * 3.4 * 9.8 * 0.06
work done by friction = -0.3798 J
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