Question

Prachi and Kanchi were observing a building having two different staircase. One slanting and other vertically spiral. Prachi was of the opinion that a person using slanting staircase will be doing more work against gravity but Kanchi thought otherwise. They started arguing. Sanchi, their friend, explained and gave entirely different view and pacified them. (๐’Š) What according to you was the explanation given by Sanchi? (๐’Š๐’Š) What appreciable values do you see in Sanchi?

  • Work and energy CBSE Class 9
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Answer

(๐ข) Sanchi explained that the energy required in both the cases is equal because whenever the work is done against gravity, the amount of work is equal to the product of weight of the body and the vertical distance through which the body is lifted.

(Work done in lifting a body = Weight of body x Vertical height).

(๐ข๐ข) Sanchi has problem solving values and conceptual value.

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