A car of mass $1250 kg$ is moving at $ 30m/s$. Its engine delivers $30 kW $ while resistive force due to surface is $ 750N. $ What max acceleration can be given in the car .............. $\mathrm{m} / \mathrm{s} ^{2}$
A car of mass $1250 kg$ is moving at $ 30m/s$. Its engine delivers $30 kW $ while resistive force due to surface is $ 750N. $ What max acceleration can be given in the car .............. $\mathrm{m} / \mathrm{s} ^{2}$
$\frac{1}{3}$
$0.25$
$0.5$
$\frac{1}{6}$
A car of mass $1250 kg$ is moving at $ 30m/s$. Its engine delivers $30 kW $ while resistive force due to surface is $ 750N. $ What max acceleration can be given in the car .............. $\mathrm{m} / \mathrm{s} ^{2}$
Force produced by the engine $F = \frac{P}{v}\, = \,\frac{{30 \times {{10}^3}}}{{30}}=10^3N$
Acceleration=$\frac{{{\rm{Forward force by engine--resistive force}}}}{{{\rm{mass of car}}}}$
$ = \frac{{1000 - 750}}{{1250}} = \frac{{250}}{{1250}}$
=$\frac{1}{5}m/{s^2}$
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