Rotation

Ans3

@SiddharthaGhosh rate of change of angular momentum is torque so torque about highest point is mg×R/2 where R is range of projectile ,plug in the values to get option 3

@VEDANTZOPE why r =R/2 can u pls show in a diagram.
Torque =r ×F F=mg downwards so r perpendicular won't be H max ? I am unable to understand this so my ans is not coming
