Question

A boy carries a bag weights 5kg from ground floor to first floor vertically upward 20m high... What is the work done by him?
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Answer 1

Explanation:

The work done by the boy is. 1 J. 10 J.

Answer 2

Question :-

A boy carries a bag weights 5kg from ground floor to first floor vertically upward 20m high. What is the work done by him?

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Solution :-

Solution :-

Given Information :-

• Weight of bag (mass 'm') = 5 kg
• Height reached (height 'h') = 20 m
• Gravity ('g')(not given) = 10 m/sec

To Find :-

• Work done by the boy.

Calculation :-

$\sf{mass = 5 \: kg}$

$\small \sf{displacement \: (height \: reached) = 20 \: m}$

$\implies \sf{ force = ?} \\ \: \: \: \: \: \: \: \: \: \: \: \: \sf{work \: done = ?}$

$\small\sf{force = mass \times accleration \: due \: to \: gravity}$

$\implies \: \sf{force = 5 \times 10}$

$\implies \: \sf{force = 50 \: N}$

$\small \therefore \: \sf{work \: done = force \times displacement}$

$\implies \sf{work \: done = 50 \times 20}$

$\implies \: \boxed{\boxed{\sf{work \: done =1000 \:J}}}$

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Final Answer :-

$\red \maltese \: \: \boxed{\boxed{\sf \red{work \: done =1000 \:J}}}$

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