This time its a statics problem

In summary, the problem at hand involves a nonuniform bar suspended at rest in a horizontal position by two massless cords. The cords make angles theta1 = 36.9 and theta2 = 53.1 with the vertical, while the length of the bar is 6.10m. The goal is to compute the distance x from the left-hand end of the bar to its center of mass. The equations to solve for this problem are T1sin(theta1) + T2sin(theta2) = mg and T1cos(theta1) - T2cos(theta2) = 0, where T1 and T2 are the tensions on the cords supporting the rod. Taking the moment at one end and solving for
  • #1
Cyrad2
13
0
A nonuniform bar is suspended at rest in a horizontal position by two massless cords as shown. One cord makes the angle theta1 = 36.9 with the vertical; the other makes the angle theta2 = 53.1 with the vertical. If the length L of the bar is 6.10m, compute the distance x from the left-hand end of the bar to its center of mass.

I keep getting stuck on this one. Basically all I know is that it's a statics problem, since it's at rest. So, I know that

T1 sin(theta1) + T2 sin(theta2) = mg
T1 cos(theta1) - T2 cos(theta2) = 0
where T1 and T2 are the tensions on the cords supporting the rod.

There are so many unknowns that I'm not sure where to go from here, but I've been playing around with:

T1sin(theta1)*X - T2sin(theta2)*(L-X) = 0
(Force1 * Distance1) == (Force2 * Distance2)

I would appreciate some suggestions and hints! (i'm not asking for anyone to solve it because the problem may be on my test tommarow). Thanks a bunch!
 
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  • #2
...sry. didnt mean to post this twice
 
  • #3
Your first 2 equations is wrong already. sin and cos should exchange. Hint: Take the summation of moment at one of the end.
 

FAQ: This time its a statics problem

What is statics?

Statics is the branch of mechanics that deals with the study of objects at rest or in uniform motion.

What are the main principles of statics?

The main principles of statics are the equilibrium of forces, the concept of center of gravity, and the use of free body diagrams to analyze forces acting on an object.

How is statics different from dynamics?

While statics deals with objects at rest or in uniform motion, dynamics deals with objects that are accelerating or changing their motion. Dynamics also takes into account the effects of mass and acceleration on an object.

What are some common applications of statics?

Statics is used in a variety of fields such as civil engineering, mechanical engineering, and architecture. Some common applications include designing structures, analyzing forces on bridges, and determining the stability of buildings.

How can I solve a statics problem?

To solve a statics problem, you need to first identify the forces acting on the object and their respective magnitudes and directions. Then, you can use the principles of statics to determine whether the object is in equilibrium and solve for any unknown forces or values.

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