Question

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.
a. 225 J
b. 220 J
C. 100 J
D. 150 J​

Answer 1

Answer:

220.5 J

Explanation:

Given data,

M=15kg

g=9.8m/$s^{2}$  

h=1.5m

work done by porter on luggage = force * displacement =mgh

=15×9.8×1.5

= 220.5 J

 

Answer 2

Answer:

The work done by porter on the luggage​ is 225 J

Explanation:

Given,

A porter lifts a luggage of mass = 15 kg from the ground.

It's on his head 1.5 m above the ground.

To find: The work done by him on the luggage​

Solution:

here, Force is due to the weight of the luggage.

i.e F = mg , where m = mass of luggage and g = accerleration due to gravity

or, F = 15 * 10 = 150 N

Work done can be given as:

W = F * s

where, F = force and s = displacement i.e 1.5 m

W = 150 * 1.5 = 225 J

Therefore, The work done by porter on the luggage​ is 225 J.