Work Energy and Power - Result Question 4

6. Force F on a particle moving in a straight line varies with distance d as shown in the figure. The work done on the particle during its displacement of 12m is

[2011]

(a) 18J

(b) 21J

(c) 26J

(d) 13J

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Answer:

Correct Answer: 6. (d)

Solution:

  1. (d) Work done = area under F-d graph

 From x=0 to x=12m12mv2=100+3047.5+20v=410=20.6m/s

=[2×(73)]+[12×2×(127).



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