it takes 20 s for A to climb up a stair while B does the same in 15 s. compare the work done and power developed by A and B
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1/20s-1/15s
=(314)/60
=7/60
=60/7
ab isko mixed fraction kejea
=(314)/60
=7/60
=60/7
ab isko mixed fraction kejea
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Answered by
14
ANSWER -
Let h be the height of staircase climbed by A and B. Let mA is weight of A and mB is weight of B.
Workdone by A to climb the Staircase, WA = mA×g×h Joules
Workdone by B to climb the Staircase WB = mB×g×h Joules
Hence the ratio WA/WB = mA / mB
Power developed by A, PA = (mA×g×h)/20 watts
Power developed by B, PB = (mB×g×h)/15 watts
Power ratio PA/PB = (15mA)/(20mB) = (3mA)/(4mB)
Let h be the height of staircase climbed by A and B. Let mA is weight of A and mB is weight of B.
Workdone by A to climb the Staircase, WA = mA×g×h Joules
Workdone by B to climb the Staircase WB = mB×g×h Joules
Hence the ratio WA/WB = mA / mB
Power developed by A, PA = (mA×g×h)/20 watts
Power developed by B, PB = (mB×g×h)/15 watts
Power ratio PA/PB = (15mA)/(20mB) = (3mA)/(4mB)
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