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It Takes 20 S for a Girl a to Climb up the Stairs While Girl B Takes 15 S for the Same Job. Compare the Power Spent by Then. - ICSE Class 8 - Physics

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Question

It takes 20 s for a girl A to climb up the stairs while girl B takes 15 s for the same job. Compare the power spent by then.

Solution

 

Power = `"Work done"/"Time taken "` = `"Energy" /"Time"`

           = `"Power of A "/ "Power of B"` = `(" Energy "/ t_1 )/("Energy "/ t_2)` = `1/t_1` ' `t_2/1` =`15/20`

           = `3/4` = 3 : 4

  Is there an error in this question or solution?
Solution It Takes 20 S for a Girl a to Climb up the Stairs While Girl B Takes 15 S for the Same Job. Compare the Power Spent by Then. Concept: Difference Between Energy and Power.
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