A body is thrown at angle $30^{\circ}$ to the horizontal with the velocity of $30\; m / s$. After $1\;sec$, its velocity will be (in $m/s$) $\left(g=10\; m / s ^{2}\right)$
$10\sqrt 7 $
$700\sqrt {10} $
$100\sqrt 7 $
$\sqrt {40} $
The speed of a projectile at its maximum height is half of its intial speed. The angle of projection is ......... $^o$
A projectile is thrown in the upward direction making an angle of $60^o $ with the horizontal direction with a velocity of $147\ ms^{-1}$ . Then the time after which its inclination with the horizontal is $45^o $ , is ......... $\sec$
An object is thrown along a direction inclined at an angle of ${45^o}$ with the horizontal direction. The horizontal range of the particle is equal to
At what point of a projectile motion acceleration and velocity are perpendicular to each other
In projectile motion, the modulus of rate of change of velocity