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NEET
Exam
NEET
Subject
Physics
Chapter
Work, Power and Energy

NEET · Physics · Work, Power and Energy

The velocity-time graph of a particle of mass 10kg is shown in the...

The velocity-time graph of a particle of mass 10kg10kg is shown in the figure. The net work done on the particle in the first two seconds of the motion is

The velocity-time graph of a particle of mass 10kg is shown in the figure. The net work done on the particle in the

Options

  1. A−9300J- 9300\text{J}
  2. B12000J12000\text{J}
  3. C−4500J- 4500\text{J}
  4. D−12000J- 12000\text{J}

Correct answer

C. −4500J- 4500\text{J}

Step-by-step solution

v=−5t+50v = - 5t + 50

vatt=2=40{v}_{att = 2} = 40

∆K.E.=W.D.=12(402−502)×10∆ K . E . = W . D . = \dfrac{1}{2}\left({40}^{2} - {50}^{2}\right) \times 10

=−4500= - 4500 J
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