Balls $A$ and $B$ are thrown from two points lying on the same horizontal plane separated by a distance $120\,m$. Which of the following statement$(s)$ is/are correct.

A truck is moving on the horizontal road with constant speed $v.$  A ball is thrown from the truck vertical up at speed  $u$  $w.r.t.$  truck. What is distance traversed by the truck when ball returns on the truck

A particle is projected with an angle of projection $\theta$ to the horizontal line passing through the points $( P , Q )$ and $( Q , P )$ referred to horizontal and vertical axes (can be treated as $x$-axis and $y$-axis respectively).

The angle of projection can be given by

A projectile is fired at a speed of $100\, m/sec$ at an angle of $37^o$ above the horizontal. At the highest point, the projectile breaks into two parts of mass ratio $1:3$, the smaller coming to rest. Then the distance of heavier part from the launching point is ........... $m$.

A large number of bullets are fired in all directions with same speed $v$. What is the maximum area on the ground on which these bullets will spread

At what angle the particle should be projected to cover maximum range ?