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NEET 2011
Exam
NEET
Year
2011
Subject
Physics
Chapter
Work, Power and Energy

NEET 2011 · Physics · Work, Power and Energy

Force F on a particle moving in a straight line varies with...

Force FF on a particle moving in a straight line varies with distance dd as shown in the figure. The work done on the particle during its displacement of 12 m12 \mathrm{~m} is Force F on a particle moving in a straight line varies with distance d as shown in the figure. The work done on the

Options

  1. A21 J21 \mathrm{~J}
  2. B26 J26 \mathrm{~J}
  3. C13 J13 \mathrm{~J}
  4. D18 J18 \mathrm{~J}

Correct answer

C. 13 J13 \mathrm{~J}

Step-by-step solution

Work done = Area under (F−x)(F-x) graph =2×(7−3)+12×2×(12−7)=8+12×10=8+5=13 J\begin{aligned}& =2 \times(7-3)+\frac{1}{2} \times2 \times(12-7) \\ & =8+\frac{1}{2} \times10 \\ & =8+5=13 \mathrm{~J} \end{aligned}
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