1. What is the work down by friction when the block moves from point A to point

Question

1. What is the work down by friction when the block moves from point A to point B along back 3? WFric-3 =

2. What is the work done by friction if the block moves in a closed loop, starting at point A along path 2 and then back along path 3? WFric-23 =

3. What is the work done by friction if the blcok moves in a closed loop, starting at point A along path 1 and then back along path 2? WFric-12 =

4. What is the work done by friction if the block moves in a closed loop, starting at point A along path 1 and then returning along the same path? WFric-11

5. What is the work done by a conservative force if the block moves in a closed loop, starting at point A along path 1 and then back along path 2?Wconserv-12 =

Explanation / Answer

1)   WFric-3 = 0.24 * 3.6 * 9.8 * 7

                  = 59.27 J

2)   WFric-23 =   0.24 * 3.6 * 9.8 * 12

                    = 101.606 J

3)     WFric-12 =    0.24 * 3.6 * 9.8 * 16

                       = 135.47 J

4) WFric-11   =    0.24 * 3.6 * 9.8 * 22

                     = 186.278 J

5)   Wconserv-12   =   0 J

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