A block is pulled along a smooth horizontal surface by a constant force of 35 N acting at an angle of 60∘ 60^\circ\,60∘ to the horizontal. The block is displaced by a horizontal distance of 240 cm.
Calculate the work done by this force on the block.
4200 J4200\text{ J}4200 J
84 J84\text{ J}84 J
42 J42\text{ J}42 J
73 J73\text{ J}73 J