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APPLICATI

ON OF

POWERi) State the meaning of powerii) State the unit of power

iii) Calculate power on the power

done

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POWER

Rate of doing , that is the work done in one

second (or energy used per second)

Power (watt/W)= work done()

Time (second/s)

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unit= watts(W) or joues per second (js!")

#uide to cacuate the power "!write formua

$!su%stitute the &aue

'!di&ide the work with time

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EXAMPLE 1

Time needed to push a %o is seconds*

Work done is '+ , power-

Power= work done time

= '+j

s = 6W

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EXAMPLE 2

.hmad pushed car with force +0 o&er a

distance $m in "+ seconds* power-

Power= work done

time = force 1 distance

time

= + 1 $m "+s

= 90 W

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Thank you for

paying attention!