The picture below shows Jamal pushing with a 100-Newton (N) force on a large box. Neither Jamal nor the box move when he pushes on it.
What force is the box applying on Jamal?
a
a 60 N force in the opposite direction that Jamal is pushing it
b
a 20 N force in the opposite direction that Jamal is pushing it
c
a 100 N force in the opposite direction that Jamal is pushing it
d
a 0 N force in the opposite direction that Jamal is pushing it