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Four men lift a 250 kg box to a height of 1 m and hold it without raising or lowering it.

how much work is done by the men in lifting the box?

User Oliverbj
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1 Answer

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Final answer:

The work done by the men in lifting a 250 kg box to a height of 1 meter is 2450 joules, calculated by the formula W = mgh, where m is the mass, g is the acceleration due to gravity, and h is the height.

Step-by-step explanation:

The student is asking about the work done in lifting a 250 kg box to a height of 1 meter. In physics, the concept of work is defined as the force applied to an object times the distance that object moves in the direction of the force. The work done by the men to lift the box can be calculated using the formula work (W) = force (F) × distance (d), where the force, in this case, is equal to the weight of the box due to gravity, which is mass (m) × acceleration due to gravity (g), and the distance is the height (h) the box was lifted.

So, we calculate the work done (W) by multiple men as W = mgh = 250 kg × 9.8 m/s² × 1 m = 2450 J (joules), assuming g to be 9.8 m/s² which is the acceleration due to gravity.

Therefore, the total work done by the men in lifting the box is 2450 joules. Notably, holding the box without raising or lowering it does not involve doing further work, as work requires movement in the direction of the force applied.

User Lasse Edsvik
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