Question

A student carries a bag weighing 5 kg from the ground floor to his class on the first floor that is 2 m high. What work is done by the boy

Answer 1

Step-by-step explanation:

work done by boy is zero.

because w = f . s .. here f is the force which is gravitational force and s is the displacement done by bag.

w = fscos90 = 0.

Answer 2

Given :-

Weight of bag:- 5 KG

Height:- 2 m

Solution :-

Work done = Change in potential energy

= mg△H

=5×10×2

=100J

Conclusion:-

Hence, we have calculated the work done by the boy by carrying the weight at the height of 2 m and the work done of the boy is 100 J.