Solving a Tough Physics Problem: Force Exerted by a Falling Chain on a Table

  • Thread starter Thread starter epl_manutd
  • Start date Start date
  • Tags Tags
    Physics
AI Thread Summary
The discussion revolves around calculating the force exerted by a table on a falling chain of length L and mass M after it has fallen a distance x. The solution to the problem is identified as 3xgM/L, but participants seek clarification on how this result is derived. There are issues accessing the necessary figure for visual reference, prompting suggestions to find alternative sources. Participants emphasize the importance of sharing initial thoughts on the problem, hinting at concepts like gravity and impulse to aid understanding. The conversation highlights the need for collaborative problem-solving in physics.
epl_manutd
Messages
11
Reaction score
0
A chain of length L and total mass M is released from rest with its lower end just touching the top of a table, as in figure
(a). Find the force exerted by the table on the chain after the chain has fallen through a distance x, as in figure (b).
Assume each link comes to rest the instant it reaches the table.

figure can be found at
http://polaris.deas.harvard.edu/gali...52/151/hw5.pdf
#11

Thanks

The answer is 3xgM/L if you wonder. I want to know how that is achieved.
 
Last edited by a moderator:
Physics news on Phys.org
I could not access the figure. Would you please see if you can fix that?
 
that is the link

http://polaris.deas.harvard.edu/galileo/images/material/852/151/hw5.pdf
 
Last edited by a moderator:
hmm, it doesn't get posted
try google: "released from rest with its lower end"
there is a pdf file that has harvard on it.
and it's #11 of that

Sorry
 
I see the image, before you get help you must show your thoughts about the problem. Say something about it.
 
a hint gravity and impulse
 

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Similar threads

Analyzing the Fall of a Chain: Problem 103 of 200 Puzzling Physics Problems
Replies
7
Views
2K
Force due to a chain falling on a table
Replies
11
Views
3K
What is the force exerted by a falling chain on a table?
Replies
2
Views
4K
Finding the Force Applied by a Support on a Falling Chain
Replies
2
Views
2K
Net Vertical Force on a Slipping Chain on a Table
Replies
12
Views
2K
What is the Force Between Links in a Falling Chain?
Replies
2
Views
3K
What is the reading on a scale when a chain falls onto it?
Replies
9
Views
2K
How Does the Falling Chain Problem Illustrate Variable Mass Dynamics?
Replies
9
Views
18K
Impulsive force due to a falling chain
Replies
2
Views
3K
Calculating the Force on a Falling Chain: Solving a Momentum Problem
Replies
6
Views
3K

Hot Threads

Recent Insights

Back
Top