Calcule the torsion force

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elleo_88

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There is a wrench that is 25 cm long and a force F= 33i+24j+21k is applied with an angle of 37 degrees like is shown in the picture
Calculate the magnitude of the force of the torque in the point P
 

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elleo_88 said:
There is a wrench that is 25 cm long and a force F= 33i+24j+21k is applied with an angle of 37 degrees like is shown in the picture
Calculate the magnitude of the force of the torque in the point P
Click to expand...
Something got lost in translation.

Is the problem asking for the magnitude of the "torque" vector (generated by the force and the "arm" vectors)?
 
elleo_88 said:
Yes, the magnitude of the torque vector in the point P
Click to expand...
Have you watched the video referenced in response #2?

What is the arm-vector (r) of the torque?

What is the force (F) vector? What is the magnitude of the force vector?

What is the cross-product of those two vectors (T = r X F) - That is your torque vector.

Now calculate the Magnitude of T. (in lots of problems "units" will be involved).

If you are stuck, show us your work and tell us exactly where you are stuck.
 
Subhotosh Khan said:
Have you watched the video referenced in response #2?

What is the arm-vector (r) of the torque?

What is the force (F) vector? What is the magnitude of the force vector?

What is the cross-product of those two vectors (T = r X F) - That is your torque vector.

Now calculate the Magnitude of T. (in lots of problems "units" will be involved).

If you are stuck, show us your work and tell us exactly where you are stuck.
Click to expand...
I watched the video but the example is when you have the scalar magnitude of the force, like 10 N but I have a vector instead, so I tried to calculate the absolute value of the vector and use that like the magnitude
see the attached image
I don’t know if I’m right
 

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elleo_88 said:
I watched the video but the example is when you have the scalar magnitude of the force, like 10 N but I have a vector instead, so I tried to calculate the absolute value of the vector and use that like the magnitude
see the attached image
I don’t know if I’m right
Click to expand...
Do you know how to take a "cross-product" of vectors?

Have you attached the correct picture with the problem?

For your problem, which way is the unit vector i pointed?
 
Subhotosh Khan said:
Do you know how to take a "cross-product" of vectors?

Have you attached the correct picture with the problem?

For your problem, which way is the unit vector i pointed?
Click to expand...
1. Yes, but how I am going to use that if I have only one vector?
2. Yes, is the correct picture
3. I think upwards, becasue the force is in that way
 
elleo_88 said:
1. Yes, but how I am going to use that if I have only one vector?
2. Yes, is the correct picture
3. I think upwards, because the force is in that way
Click to expand...
This problem statement - with the given picture is incomplete.

The problem states that F= 33i+24j+21k

For that statement to be useful, directions of i, j & k must be fixed

From the definition of F, this is a 3-D problem. Without defining a plane, the angle 37o is redundant in conjunction with the given F= 33i+24j+21k

Force F does not have a designated unit.

If the problem as you have posted, has come from a book or other printed material, please post the COMPLETE problem.
 
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