A 20N force pushes an object along two straight segments on a smooth horizontal surface. First, the object moves 3.0m in the same direction as the force. The force then changes direction (its magnitude is unchanged) and makes a 120∘ angle with a second 2.0m displacement. What is the total work done by the force during the entire motion?
a) 80J
b) 100J
c) 40J
d) 60J