A car of mass $1000 kg$ accelerates uniformly from rest to a velocity of $54 km/hour $ in $ 5s$. The average power of the engine during this period in watts is .............. $W$ (neglect friction)
A car of mass $1000 kg$ accelerates uniformly from rest to a velocity of $54 km/hour $ in $ 5s$. The average power of the engine during this period in watts is .............. $W$ (neglect friction)
$2000 $
$22500 $
$5000 $
$2250 $
A car of mass $1000 kg$ accelerates uniformly from rest to a velocity of $54 km/hour $ in $ 5s$. The average power of the engine during this period in watts is .............. $W$ (neglect friction)
Power$ = \frac{{{\rm{Work done}}}}{{{\rm{time}}}} = \frac{{{\rm{Increase in K}}{\rm{.E}}{\rm{.}}}}{{{\rm{time}}}}$
$P = \frac{{\frac{1}{2}m{v^2}}}{t} = \frac{{\frac{1}{2} \times {{10}^3} \times {{(15)}^2}}}{5} = 22500\,W$