Property of for same acceleration

AI Thread Summary
The discussion centers on the concept that two connected bodies accelerate together, such as a person in an accelerating elevator, which is referred to as "rigid motion" or "Born rigid motion" in relativity. This property implies that if one body accelerates, the other does as well, provided they maintain a fixed distance and orientation. The conversation questions whether this principle has a specific name or is simply an intuitive understanding of motion. It emphasizes that the connection, such as a rope or string, must not stretch for the same acceleration to apply. Overall, the concept highlights the logical relationship between connected objects during acceleration.
andyrk
Messages
658
Reaction score
5
Does the property that two bodies connected together and if one of them is accelerating with some acceleration the second also accelerates with the same acceleration, have a name? Like for example, if there is a person in an elevator and the elevator is accelerating with acceleration ##a##, then the person also accelerates with acceleration ##a##. Is there a name for this property? Or is not a property because it is so logical that it is said so because it makes sense?
 
Physics news on Phys.org
When to masses are connected with a rope or string, the condition is that the rope or string not stretch.

More generally, there needs to be a fixed distance and orientation between the two objects the for their acceleration to be the same.
 
Dr. Courtney said:
When to masses are connected with a rope or string, the condition is that the rope or string not stretch.

More generally, there needs to be a fixed distance and orientation between the two objects the for their acceleration to be the same.
What about the case for a person inside an accelerating elevator?
 
It is called rigid motion or, in relativity, Born rigid motion.
 

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 Why don't we "fly up" in an accelerating elevator?
Replies
11
Views
3K
I Acceleration in Newton's second law
Replies
5
Views
2K
B Help me understand jerk of a falling object hitting an "ideal foam"
Replies
7
Views
1K
I Why does a free rigid body rotate only about its COM when F(ext) is applied?
Replies
7
Views
1K
A thought I had about inertia, and derivatives of acceleration
Replies
1
Views
2K
I Question about Einstein's famous elevator experiment
Replies
29
Views
2K
Angular Acceleration: Understanding the Relationship Between Connected Pulleys
Replies
12
Views
2K
I Stuck in understanding Newton's 3 laws
Replies
18
Views
2K
I Reference frames in terms of homogenity/isotropy
Replies
18
Views
2K
When Does an Object Experience Only Centripetal Acceleration in Circular Motion?
Replies
2
Views
1K

Hot Threads

Recent Insights

Back
Top