Is the F Pointing to the Right Friction or Force of the Truck Accelerating?

AI Thread Summary
The discussion revolves around understanding the forces acting on a cabinet in a truck during acceleration. The participants clarify that the force (F) depicted in the free body diagram represents both the friction and the force of the truck's acceleration. It is noted that the only horizontal force acting on the cabinet is the friction force, which indeed points to the left, opposing the rightward pull. Additionally, the normal force (N) does not pass through the center of mass due to the acceleration creating a non-zero moment about that point. This highlights the complexities of analyzing forces in a non-inertial reference frame.
xzibition8612
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Homework Statement



See attachment.

Homework Equations





The Attempt at a Solution



My only question concerns the free body diagram. In the attachment, is the F pointing to the right friction or force of the truck accelerating? Why is the line of action of N not go through the mass center? And shouldn't friction for the cabinet point toward the left since a force is pulling it right?
I'm very confused about this.
Any help is appreciated thanks.
 

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hi xzibition8612! :smile:
xzibition8612 said:
In the attachment, is the F pointing to the right friction or force of the truck accelerating?

both …

the only horizontal force on the cabinet is the friction force :wink:​
And shouldn't friction for the cabinet point toward the left since a force is pulling it right?

see above :rolleyes:
Why is the line of action of N not go through the mass center?

take moments about the point below the centre of mass …

the centre of mass is accelerating, so there's a non-zero moment of acceleration about that point, which show that the normal force must also have a non-zero moment
 

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