A cart is moving horizontally along a straight line with a constant speed of $30\,m / s$. A projectile is to be fired from the moving cart in such a way that it will retum to the cart (at the same point on cart) after the cart has moved $80\,m$. At what velocity (relative to the cart) must be projectile be fired? (Take $=10\,m / s ^2$ )
$10\,m/s$
$\frac{20}{3}\,m/s$
$\frac{40}{3}\,m/s$
$\frac{80}{3}\,m/s$
The maximum horizontal range of a projectile is $400\, m$. The maximum value of height attained by it will be ......... $m$
Range of a bob of mass $1\, kg$ is $80\,m$ while it attains maximum height $20\,m$. Its change in momentum in complete motion ............ $N-s$
A bullet is dropped from the same height when another bullet is fired horizontally. They will hit the ground
Neglecting the air resistance, the time of flight of a projectile is determined by
A projectile is fired at $30^{\circ}$ to the horizontal, The vertical component of its velocity is $80 \;ms ^{-1}$, Its time flight is $T$. What will be the velocity of projectile at $t =\frac{ T }{2}$?