A girl is carrying a school bag of $3 k g$ mass on her back and moves $200 m$ on a leveled road. The work done against the gravitational force will be ( $g = 10 m / s^{2}$ ) :

6 \times 10^{3} J

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6 J

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0.6 J

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Z e r o

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None of these

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Solution

The correct option is B $Z e r o$
The amount of work done is expressed in the equation: $W = F . d c o s θ$ . In this case, the total work done is zero as the displacement is perpendicular to the applied force.

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