A projectile has the same range $R$ for two angles of projection. If $T_1$ and $T_2$ be the times of flight in the two cases, then $R$ is
$T_1T_2g$
$\frac{T_1T_2g}{2}$
$(T_1^2 + T_2^2)g$
$\frac{(T_1^2 + T_2^2)}{2}g$
A ball is thrown from a roof top at an angle of $45^o$ above the horizontal. It hits the ground a few seconds later. At what point during its motion, does the ball have $(a)$ greatest speed $(b)$ smallest speed $(c)$ greatest acceleration - Explain.
A ball thrown by one player reaches the other in $2$ sec. the maximum height attained by the ball above the point of projection will be about ....... $m$
A ball is thrown upwards and it returns to ground describing a parabolic path. Which of the following remains constant
A projectile crosses two walls of equal height $H$ symmetrically as shown The maximum height of the projectile is ........ $m$
Two balls are projected with the same velocity but with different angles with the horizontal. Their ranges are equal. If the angle of projection of one is $30^{\circ}$ and its maximum height is $h$, then the maximum height of other will be