Finding tension and force in a cord

Tsin 37.In summary, the conversation discusses a problem involving a weight suspended by a cord at an angle, and the goal of finding the force and tension in the cord. The relevant equations are mentioned, and the individual's attempt at solving the problem is described. However, they are unsure of their equations and ask for help. The solution is given, which involves solving for T and then using it to find the horizontal force.
  • #1
lesdavies123
16
0

Homework Statement



Hey there,

Here is the problem: A weight of 2 kg is suspended by a single cord. An horizontal force keeps the cord at 37 degrees from the vertical. Find (a) the force, (b) the tension in the cord.

Relevent equations are Weight = mass x acceleration, I use 9,81 m/seconds squared for the gravitational acceleration.

Here is my attempt at a solution:

I started by drawing a diagram of the problem. Then I tried to set my equations:

The sum of my forces in x = 0 N = -cos(90-37)T
First of all I am unsure of this one, this doesn't really make sense because my weight isn't moving horizontally, while if I base myself on this equation it should be in movement.

The sum of my forces in y = 0 N= -Weight + sin(90-37)T

Basically this is what I thought but I soon realized that these two equations could not work, maybe the second one but the first one definitely not. Then, I couldn't figure out what I was missing. Can you guys help me out, and show me the methodology to do this problem.
Thanks a lot everybody!
 
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  • #2
Solve for T from the sum of forces in Y equation, since the only unknown is T.
Now substitute T into the "x Sum" equation to solve for the horizontal force.

The x direction equation should be:
0 = Fh - Tsin 37
That equation does not imply movement, it is that the horizontal component of the rope tension is balanced by the restraining force, Fh
 

FAQ: Finding tension and force in a cord

What is tension?

Tension is a force that is exerted on an object by a cord or rope when it is pulled in opposite directions. It is also known as the pulling force.

How is tension calculated?

Tension is calculated using the formula T = F * cos(θ), where T is the tension force, F is the applied force, and θ is the angle between the cord and the direction of the applied force.

What factors affect tension in a cord?

The factors that affect tension in a cord include the magnitude of the applied force, the angle at which the force is applied, the weight of the object being pulled, and the properties of the cord such as elasticity and length.

How do you find the force in a cord?

To find the force in a cord, you can use the formula F = T / cos(θ), where F is the force, T is the tension force, and θ is the angle between the cord and the direction of the applied force.

Can tension in a cord be greater than the applied force?

Yes, tension in a cord can be greater than the applied force. This can happen when the angle between the cord and the direction of the applied force is less than 90 degrees, resulting in a larger tension force to balance the applied force.

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