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 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »

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 »

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