Question

Example 11.2-
A porter lifts a luggage of 15
kg from the ground and puts it on his head 1.5 m above the ground. Calculate the work done by him on the luggage.

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Answer 1

Answer:

Mass = 15 kg

Height = 1.5 kg

Work done here is the potential energy = mgh

= 15 × 10m/sec2 × 1.5 m

= 225 joules.

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Answer 2

Answer:

Given data,

M=15kg

g=9.8m/s2

h=1.5m

work done by porter on luggage = force * displacement

=mgh

=15×9.8×1.5

=220.5J

Explanation:

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