RRB Group D 17-Sep-2018 Shift 2 Solved Paper

Question : 10 of 100

Marks: +1, -0

A person lifts luggage of 20 kg from the ground and puts it on his head 2 m above the ground.
Calculate the work done by him ( g = 10 m s^-2)

Solution:

Mass

=20 {kg},

Distance

=2 {m}

and acceleration due to gravity

=10 {m} \/ {s}^{2}

Work done

=

F.d

=m × a × d

=20 × 10 × 2

=400

Joule

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