A girl of mass 10 kg takes a staircase of 18 steps,each of height 20 cm. calculate the amount of work she has done to carry the bag. [Take g = 10 m/s2]
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Answer:
Work done =mgh
mass=10 kg
g=10m/s^2
h=18×20
=360 cm
---------
100
=3.6 m
m×g×h
=10×10×3.6
=100×3.6
=360 Joules.
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