Need help on rotational dynamics problem quick please

AI Thread Summary
The discussion revolves around solving a rotational dynamics problem involving an inverted "A" structure suspended by two vertical ropes. The key points highlight that the system is in static equilibrium, meaning the net force and torque must equal zero. Participants suggest using the formula W=Fcosd to find the force applied by the crossbar to each leg, but there is confusion regarding the displacement measurement, questioning whether it should be in meters instead of the given length. Clarity on the dimensions and understanding the equilibrium conditions are essential for solving the problem. The conversation emphasizes the importance of correctly interpreting the problem's parameters to proceed effectively.
Crazedkid
Messages
7
Reaction score
0
hi i need help understanding what to do with the information that was given in the problem if u could point mein the right direction i would greatly appreciate it. thank you

An invered "A" is suspended from the ceiling by 2 verticle ropes. Each leg of the "A" has a length of 2L and a weight of 120.0N. The horizontal crossbar has a negligable weight. Find the force that the crossbar applies to each leg.
Known:
W=120.0N per leg
l of legs= 2L
angle at top of "A" = 60Degrees
l of crossbar=L
 
Physics news on Phys.org
I think the key idea here is that the system is in static equilibrium. That means that the net force and torque are zero. Can you take it from there?
 
Parth Dave is right. The system is at rest so the net force is 0. If that is not the case read below.

the formula is W=Fcosd

but what doesn't make sense is that you don't have the displacement. Are you sure it says 2L not 2m.
 
Last edited:

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Need help on a rotational dynamics problem for tomorow please
Replies
2
Views
3K
Question about springs and rotational/translational energy
Replies
4
Views
1K
Intuition on the direction of friction in a rotational dynamics problem
Replies
13
Views
2K
Torque with "complex" object (static/equilibrium)
Replies
1
Views
2K
Rotating rod of negligible mass attached to two point masses
Replies
19
Views
4K
Experimental Design: Pulley and Mass Hangers
Replies
30
Views
3K
Problem in Classical Mechanics
Replies
1
Views
2K
Rotational Dynamics Pulley Problem Help needed
Replies
4
Views
2K
Calculation of Kinetic Energy in Rotation Motion
Replies
11
Views
2K
What Is the Stiffness Constant k of the Spring?
Replies
26
Views
5K

Hot Threads

Recent Insights

Back
Top