The drawing below is supposed to be a free-body diagram of 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, $\vec{F}_{S F}$ should point leftward.
C) No, the $\vec{F}_{S F}$ label should be $\vec{F}_{K F}$.
D) No, there should be a leftward drag force.
E) No, $\left|\vec{F}_{N}\right|$ should not be equal to $\left|\vec{F}_{g}\right|$.
F) No, there is some other problem (specify).

Question

The drawing below is supposed to be a free-body diagram of 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, $\vec{F}_{S F}$ should point leftward. 
C) No, the $\vec{F}_{S F}$ label should be $\vec{F}_{K F}$. 
D) No, there should be a leftward drag force. 
E) No, $\left|\vec{F}_{N}\right|$ should not be equal to $\left|\vec{F}_{g}\right|$. 
F) No, there is some other problem (specify).

Quizplus · Accepted Answer

The Answer of The drawing below is supposed to be a free-body diagram of 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, $\vec{F}_{S F}$ should point leftward. 
C) No, the $\vec{F}_{S F}$ label should be $\vec{F}_{K F}$. 
D) No, there should be a leftward drag force. 
E) No, $\left|\vec{F}_{N}\right|$ should not be equal to $\left|\vec{F}_{g}\right|$. 
F) No, there is some other problem (specify).

The Drawing Below Is Supposed to Be a Free-Body Diagram F⃗SF\vec{F}_{S F}FSF​

The Drawing Below Is Supposed to Be a Free-Body Diagram $\vec{F}_{S F}$