A paricle of mass m is projected with a velocity u at angle alpha with the horizontal. Work done by gravity during its descent from its highest point to, the position where its velocity vector makes an angle (alpha)/2 with the horizontal is

A paricle of mass m is projected with a velocity u at angle alpha with

1.	A paricle of mass m is projected with a velocity u at angle alpha with the horizontal. Work done by gravity during its descent from its highest point to, the position where its velocity vector makes an angle (alpha)/2 with the horizontal is
Answer» `1/2"MU"^(2)TAN^(2)ALPHA` `1/2"mu"^(2)"tan"^(2)(alpha)/2` `1/2"mu"^(2)cos^(2)alpha "tan"^(2)(alpha)/2` `1/2"mu"^(2)"cos"^(2)(alpha)/2SIN^(2)alpha` Answer :C