A girl carries a 10kg bag upstairs to a height of 18 steps, each 20cm high. Calculate the amount of work she has done to carry the bag.
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Answer:
Mass (m) = 10 kg
Height (h) = 20 cm * 18 Steps
= (20/100) m * 18 Steps
= 3.6 m
Acceleration due to gravity (g) = 9.8 m/s²
∴ Work Done = Force*Displacement
= (mg) * h
= 10*9.8*3.6 J
= 352.8 J is the Work Done.
I hop this helps.
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