A projectile is launched from ground level with speed u at an angle of  above the horizontal. Find in terms of u,  and g by proving: the maximum height H attained by the projectile, the distance from the starting point at which the projectile strikes the ground; this is called the range R of the projectile. The total time of flight

A projectile is launched from ground level with speed u at an angle of  above the horizontal. Find in terms of u,  and g by proving: the maximum height H attained by the projectile, the distance from the starting point at which the projectile strikes the ground; this is called the range R of the projectile. The total time of flight