A particle of mass 'm' is projected with a velocity 'u' at an angle theta with the horizontal. Work done by gravity during its descent from its highest point to a point which is at half the maximum height is

A particle of mass 'm' is projected with a velocity 'u' at an angle th

1.	A particle of mass 'm' is projected with a velocity 'u' at an angle theta with the horizontal. Work done by gravity during its descent from its highest point to a point which is at half the maximum height is
Answer» `0` `(mu^(2) sin^(2) theta)/(4)` `(1)/(2) mu^(2) sin^(2) theta` `(1)/(2) mu^(2) COS^(2) theta` ANSWER :B