Question

A porter lifts a luggage of 15kg from the ground and puts it on his head 1.5m above the ground. Calculate the work done by him on the luggage.

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Answer 1

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Mass of the luggage, m = 15kg

Displacement, s = 1.5m

Work done, W = F × s = mg × s

= 15kg ×10 ms ×1.5m

= 225kg ms^2m

= 225Nm

= 225J

Answer 2

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Mass of the luggage, m = 15kg

Displacement, s = 1.5m

Work done, W = F × s = mg × s

$\longrightarrow$ 15kg ×10 ms ×1.5m

$\longrightarrow$ 225kg ms^2m

$\longrightarrow$ 225Nm

$\longrightarrow$ 225J