A car moving with a velocity of $10 \,m/s$ can be stopped by the application of a constant force $F$ in a distance of $20\, m$. If the velocity of the car is $30\, m/s$, it can be stopped by this force in......$m$
$6.67$
$20 $
$60 $
$180$
A car moving with a velocity of $10 \,m/s$ can be stopped by the application of a constant force $F$ in a distance of $20\, m$. If the velocity of the car is $30\, m/s$, it can be stopped by this force in......$m$
$S \propto {u^2}$.
If $u$ becomes $3$ times then $S$ will become $9$ times
i.e. $9 \times 20 = 180\,m$
If $u$ becomes $3$ times then $S$ will become $9$ times
i.e. $9 \times 20 = 180\,m$
Other Language