Find the tension T of the two blocks. I think I'm doing something wrong

In summary, tension is a force that is transmitted through a medium when it is pulled tight by forces acting from opposite ends. It is calculated using the formula T = F * L, where T is the tension, F is the applied force, and L is the length of the medium. Tension is different from weight, as it is dependent on the applied force while weight is dependent on an object's mass and the force of gravity. Tension cannot be negative and is always a positive value. To find the tension of two blocks, you need to know the forces acting on each block and the length of the medium connecting them, and use the formula T = F * L.
  • #1
riseofphoenix
295
2
Find the tension T of the two blocks. I think I'm doing something wrong :(

ScreenShot2012-12-11at94641AM.png


T1 = m1g = (2)(9.81) = 19.62
T2final = T2 + T1 = m2g + m2g = (3)(9.81) + (2)(9.81) = 29.43 + 19.62 = 49.05

I did something wrong. :(
Help?
 
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  • #2


Oh wait!
T1 = (m1 + m2)g
T1 = (2 + 3)(9.81)
T1 = (5)(9.81)
T1 = (5)(9.81)
T1 = 49.05

T2 = m2g
T2 = (3)(9.81)
T2 = 29.43

Is that right? Is the answer (d)?
 
  • #3


That looks right.
T2 has to support 3kg, and T1 has to support 5kg.

You can also check this by looking at the forces on m1 :
T1 = m1g + T2
Your answers agree with this.
 

1. What is tension?

Tension is the force that is transmitted through a medium, such as a rope or cable, when it is pulled tight by forces acting from opposite ends.

2. How is tension calculated?

Tension is calculated by using the formula T = F * L, where T is the tension, F is the applied force, and L is the length of the medium.

3. What is the difference between tension and weight?

Tension is a force that is applied to an object, while weight is a measure of the force of gravity pulling on an object. Tension is dependent on the applied force, while weight is dependent on the mass of an object and the acceleration due to gravity.

4. Can tension be negative?

No, tension cannot be negative. It is always a positive value because it is a measure of the force being applied to an object.

5. How can I find the tension of two blocks?

To find the tension of two blocks, you need to know the forces acting on each block and the length of the medium connecting them. You can then use the formula T = F * L to calculate the tension.

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