Question

a coolie lift a box of 10kg from ground to height of 2 meter find work fone by the coolie on the box.{g=9.8m/s
${?}^{2}$
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Answer 1

AnsWer :-

• We're given that, mass (m) of the box is 10 kg and lifted the box from ground to height (h) of 2 meter i.e displacement (s) is 2 meter. and the force acted on the box is in the downward direction that force is known as force of gravity. We need to find the work done (W) by the coolie on the box

Let's calculate the work done by the coolie on the box by using given below formula :

↠Work done = F × s × cos θ

• F = mg

↠Work done = mg × s × cos θ

Plug in the known values in the above formula :

↠Work done = 10 × 9.8 × 2 × cos (0°)

• cos (0°) = 1

↠Work done = 98 × 2 × 1

↠Work done = 196 J

∴ The work done (W) by the coolie on the box is 196 J.