Consider a particle on which constant forces `vec(F) = hat(i) + 2hat(j) + 3hat(k)" " "N" and vec(F_(2)) = 4hat(i) - 5hat(j) - 2hat(k)" " "N"` act together resulting in a displacement from position `vec(r_(1)) = 20hat(i) + 15 hat(j) " " "cm to" " "vec(r_(2)) = 7hat(k)" "cm"`. The total work done on the particle is

Options

A. `- 0.48 j`
B. `+ 0.48 j`
C. `- 4.8 j`
D. `+ 4.8 j

Answer

A