Question 5
A girl is carrying a school bag 3 kg on her back and moves 200 m on a leveled road. The work done against the gravitational force will be (g=10ms−2)
(a) 6×103 J
(b) 6 J
(c) 0.6 J
(d) zero
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Solution
(d) zero
The height of the bag from the ground always remains constant throughout the journey, hence the work done against the gravitational force will be zero.