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

Click For Summary
SUMMARY

The discussion centers on the dynamics of a truck and cabinet system, specifically addressing the forces acting on the cabinet as the truck accelerates. The force labeled "F" in the free body diagram represents the friction force acting on the cabinet, which is the only horizontal force affecting it. Additionally, the normal force (N) does not pass through the center of mass due to the acceleration of the system, resulting in a non-zero moment about that point. Understanding these concepts is crucial for analyzing the motion of objects under acceleration.

PREREQUISITES
  • Understanding of free body diagrams
  • Knowledge of Newton's laws of motion
  • Familiarity with concepts of friction and normal force
  • Basic principles of rotational dynamics
NEXT STEPS
  • Study the principles of free body diagram analysis in physics
  • Learn about the effects of acceleration on forces acting on objects
  • Explore the relationship between friction and motion in accelerating systems
  • Investigate the calculation of moments and torques in dynamic systems
USEFUL FOR

This discussion is beneficial for physics students, educators, and anyone interested in understanding the mechanics of forces in accelerating systems, particularly in the context of free body diagrams and rotational dynamics.

xzibition8612
Messages
137
Reaction score
0

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.
 

Attachments

  • aer 001.jpg
    aer 001.jpg
    26.9 KB · Views: 461
Physics news on Phys.org
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
 

Similar threads

Replies
24
Views
3K
Replies
6
Views
3K
  • · Replies 16 ·
Replies
16
Views
1K
  • · Replies 10 ·
Replies
10
Views
6K
Replies
19
Views
3K
Replies
42
Views
3K
  • · Replies 6 ·
Replies
6
Views
3K
  • · Replies 15 ·
Replies
15
Views
1K
  • · Replies 21 ·
Replies
21
Views
1K
Replies
61
Views
4K