What is Trajectory of a projectile ?

At the top of the trajectory of a projectile the acceleration is :

A projectile is fired from the surface of the earth with a velocity of 5ms^(-1) and angle theta with the horizontal. Another projectile fired from another planet with a with a velocity of 3 ms^(-1) at the same angle follows a trajectory of the projectile fired from the earth . The value of the acceleration due to gravity on planet is ( in ms^(-2) is (given g=9.8 ms^(-2) .

Match the following : {:("Column I","Column II"),(1."Scalar product of two vectors","(i)parabola"),(2."Cross product of two vectors","(ii)Circle"),(3."Trajectory of a projectile","(iii)"u^(2)//g),(4."Maximum range of a projectile","(iv)Torque"),(,"(v)"u^(2)sin2theta//g),(,"(vi)Work"):}

A projectile is fired horizontally with a velocity u . Show that its trajectory is a parabola. Also obtain the expression for . Horizontal range .

A projectile is fired horizontally with a velocity u . Show that its trajectory is a parabola. Also obtain the expression for Time of flight .

What are the two types of projectile motion ?

The angle of projection for a projectile to cover maximum range is :