Bar holding a weight (conceptual)

  • Context: Undergrad 
  • Thread starter Thread starter usamo42j
  • Start date Start date
  • Tags Tags
    Conceptual Weight
Click For Summary
SUMMARY

The discussion revolves around the dynamics of a long, thin massless bar rotating in a circle with a weight at its end. The key focus is on the forces acting on the weight, specifically the counteraction of gravitational force. The centripetal force is identified as the necessary force to maintain the weight's position without vertical movement, preventing it from moving closer to the axis of rotation. This scenario illustrates the balance of forces in rotational motion.

PREREQUISITES
  • Understanding of centripetal force and its role in circular motion
  • Knowledge of gravitational force and its effects on objects
  • Familiarity with the concept of rotational dynamics
  • Basic principles of physics related to forces and motion
NEXT STEPS
  • Study the principles of centripetal force in detail
  • Explore the effects of gravitational force on rotating bodies
  • Learn about the dynamics of rotational motion and torque
  • Investigate real-world applications of rotational dynamics in engineering
USEFUL FOR

This discussion is beneficial for physics students, educators, and anyone interested in understanding the mechanics of rotational motion and the forces involved in maintaining equilibrium in dynamic systems.

usamo42j
Messages
9
Reaction score
0
A long, thin metal (massless) bar is rotating in a circle at constant velocity, perpendicular to the axis of rotation. A weight is placed on the end of the bar such that there is no vertical movement of the weight or bar. What force counteracts the force of gravity on the weight?.
 
Physics news on Phys.org
SkittleJuice said:
Are you sure http://en.wikipedia.org/wiki/Centripetal_force" is the right force?

Gravity is attempting to pull the weight down, which would turn the bar.

If the bar turned, the weight would get closer to the axis of rotation.

Is there a force that might be against the weight getting any closer to the axis of rotation?

;)

(My post in your homework problem question thread. It really was just me posting both places because this question is about the same problem that you were having trouble with that you posted about in the homework forum.)
 
Last edited by a moderator:

Similar threads

High School The Effect of Linear and Rotational Motion on Measured Weight
  • · Replies 10 ·
Replies
10
Views
1K
Undergrad How to calculate the "weight" of this piece of metal?
  • · Replies 12 ·
Replies
12
Views
2K
Undergrad How to account for linear momentum in a collision?
  • · Replies 10 ·
Replies
10
Views
1K
Undergrad Will This Friction Clamp Hold the Weight?
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Apparent Weight problem (falling beam)
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Modeling the damping of a physical rigid pendulum
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Understanding tension and centripedal force in a puck and weight
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad Conservation of angular momentum during collisions
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Calculating your weight in an elevator
  • · Replies 24 ·
Replies
24
Views
3K
Undergrad Car top boat loader: What is the lifting weight?
  • · Replies 9 ·
Replies
9
Views
2K