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Two persons do the same amount of work. The first person does it in 10 s and the second, in 20 s. Findthe ratio of the power used by the first person to thatby the second person |
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Answer» The required RATIO is 2 : 1Explanation:Given :Two PERSONS do the same amount of work.The first PERSON does it in 10 s and the SECOND, in 20 s.To find :the ratio of the power used by the first person to that by the second personSolution :Power :It is the rate of doing work.S.I unit of Power is Watt (W)Let W be the amount of work.P₁ , P₂ be the power used by the first person and second person respectively.t₁ , t₂ be the TIME taken by the first person and second person to do the work respectively.we know, Power used by the first person, P₁ = W/10Power used by the second person, P₂ = W/20Ratio of the power used by the first person to that of second person : ∴ The required ratio is 2 : 1 |
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