(i) Define power. Mention its SI unit.(ii) A | vedclass

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(N/A) $(i)$ Power is defined as the rate of doing work or the rate of energy transfer. Its $SI$ unit is the watt $(W)$.$(ii)$ Given: Mass $(m)$ = $50

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(N/A) $(i)$ Power is defined as the rate of doing work or the rate of energy transfer. Its $SI$ unit is the watt $(W)$.$(ii)$ Given: Mass $(m)$ = $50 \, kg$,Number of steps = $40$,Height of each step = $15 \, cm = 0.15 \, m$,Time $(t)$ = $8 \, s$,Acceleration due to gravity $(g)$ = $10 \, m \, s^{-2}$.Total height $(h)$ = $40 	imes 0.15 \, m = 6 \, m$.Work done $(W)$ = $mgh = 50 	imes 10 	imes 6 = 3000 \, J$.Power $(P)$ = $\frac{W}{t} = \frac{3000}{8} = 375 \, W$.

$(i)$ Define power. Mention its $SI$ unit.
$(ii)$ $A$ boy of mass $50 \, kg$ runs up a staircase of $40$ steps in $8 \, s$. If the height of each step is $15 \, cm$,find his power. (Given,$g = 10 \, m \, s^{-2}$)

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$(i)$ Define power. Mention its $SI$ unit.$(ii)$ $A$ boy of mass $50 \, kg$ runs up a staircase of $40$ steps in $8 \, s$. If the height of each step is $15 \, cm$,find his power. (Given,$g = 10 \, m \, s^{-2}$)