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Moment of Force

The force F...

Question

The force $F$ acting on a particle moving in a straight line is shown below. What is the work done by the force on the particle in the 1st metre of the trajectory?

5 J

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10 J

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15 J

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2.5 J

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Solution

The correct option is C $2.5 J$
Word done $=$ Area of triangle $A B C$
$= \frac{1}{2} \times 1 \times 5$
$= 2.5 J$

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