How Does Gravity Affect the Fall of a Yo-Yo?

  • Thread starter Thread starter Feynmanfan
  • Start date Start date
  • Tags Tags
    Works
AI Thread Summary
The discussion centers on the dynamics of a yo-yo-like system where a disk falls under gravity while being influenced by a string. The key question is what conditions must be met for the disk's center of mass to fall vertically. Participants explore whether the disk would fall faster if it were attached to a pole. The conversation delves into the physics of rotational motion and gravitational effects on the system. Understanding these principles is crucial for analyzing the behavior of the yo-yo as it falls.
Feynmanfan
Messages
128
Reaction score
0
Dear friends,

Here's a problem I can't solve. The disk on the picture falls under influence of gravity. The horizontal table creates no friction and the string that binds mass m and the disk is rolled up around the disk. The center of mass of the disk falls vertically.

My question is: what's the condition it has to satisfy, so that this last statement is true?

Do you think it's true that the disk will fall faster if it were attached to the pole?

Thanks for your help!
 

Attachments

Physics news on Phys.org

Thread '1:1 versus 2:1 Mechanical Advantage debate'

The rope is tied into the person (the load of 200 pounds) and the rope goes up from the person to a fixed pulley and back down to his hands. He hauls the rope to suspend himself in the air. What is the mechanical advantage of the system? The person will indeed only have to lift half of his body weight (roughly 100 pounds) because he now lessened the load by that same amount. This APPEARS to be a 2:1 because he can hold himself with half the force, but my question is: is that mechanical...
View full post »

Thread 'Newton's first law?'

Some physics textbook writer told me that Newton's first law applies only on bodies that feel no interactions at all. He said that if a body is on rest or moves in constant velocity, there is no external force acting on it. But I have heard another form of the law that says the net force acting on a body must be zero. This means there is interactions involved after all. So which one is correct?
View full post »
Thread 'Beam on an inclined plane'

Thread 'Beam on an inclined plane'

Hello! I have a question regarding a beam on an inclined plane. I was considering a beam resting on two supports attached to an inclined plane. I was almost sure that the lower support must be more loaded. My imagination about this problem is shown in the picture below. Here is how I wrote the condition of equilibrium forces: $$ \begin{cases} F_{g\parallel}=F_{t1}+F_{t2}, \\ F_{g\perp}=F_{r1}+F_{r2} \end{cases}. $$ On the other hand...
View full post »

Similar threads

I Equation of motion for a simple mechanical system
Replies
2
Views
2K
Rotational work and forces like static friction and tension
Replies
7
Views
3K
How does pressure act in all directions if gravity is downward only
Replies
4
Views
1K
Rolling without slipping problem
Replies
42
Views
3K
Solve Unwinding Yo-Yo Homework: No Slipping Allowed
Replies
49
Views
9K
Explanation of how spin art machine works
Replies
4
Views
6K
What Determines the Vertical Fall of a Yo-yo in a Frictionless Environment?
Replies
16
Views
6K
Solving Yo-Yo Force Problem: Find Acceleration & Friction Force
Replies
1
Views
3K
I An ID-card sliding on a low friction table
Replies
14
Views
1K
Does Pulley Mass Affect Rope Tension Symmetry?
Replies
8
Views
18K

Hot Threads

Recent Insights

Back
Top