Question

A coolie raises a box of mass 50 kg to a
vertical height of 3 m. Calculate the work
done by the coolie if force of gravity on
1 kg mass is 10 N.​

Answer 1

Work done = 1500J.

• When we apply force "F" to a block, the body moves with some acceleration or, additionally, its speed increases or decreases depending on the direction of the force. The system's kinetic energy changes as speed increases or decreases.
• Since we are aware that energy cannot be created or destroyed, it must be changed into another form. This perspective refers to it as completed work. When negative energy is finished, the energy decreases, and when positive energy is finished, the energy rises.

Now, we are given that,

A coolie raises a box of mass 50 kg to a vertical height of 3 m.

Now, we know that,

F = mg

Or, F = 50 × 10 = 500N

Also, Work = Force × Displacement = 500 × 3 = 1500J.

Hence, Work done = 1500J.

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