The drawing below is supposed to show the forces acting on a box that sits without slipping on the back of a truck that is moving to the right but is slowing down. Is the diagram correct?


A. Yes

B. No: the static friction force should point left.

C. No: kinetic rather than static friction acts

D. No: there should be a leftward drag force from the air.

E. No: F_N should not equal F_g