1. Tardigrade
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  4. A car is moving horizontally along a straight line with a uniform velocity of 25 m s -1. A projectile is to be fired from this car in such a way that it will return to it after it has moved 100 m. The speed of the projection must be

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Q. A car is moving horizontally along a straight line with a uniform velocity of $25\, m s ^{-1}$. A projectile is to be fired from this car in such a way that it will return to it after it has moved $100\, m$. The speed of the projection must be

Motion in a Plane

Solution:

$T=\frac{100}{25}=4 s$
$ \Rightarrow \frac{2 u \sin \theta}{g}=4 $
$\Rightarrow u \sin \theta=20 \,ms ^{-1}$