Answer to Question #345791 in Mechanics | Relativity for juls

Question

A box moves 10 m horizontally when force F=20 N is applied at an angle θ=120°. What is

the work done on the box by the force during the displacement?

Answer 1

$$W=Fd\cos\theta\\ =\rm 20\: N\times 10\: m\times \cos120^\circ=-100\:J$$