Calculating Force in the Turning Effect of Force Equation

[Muhammad Danish]

Homework Statement

Homework Equations

How do we calculate the value of F?

The Attempt at a Solution

Since for an object to be in equilibrium, F1D1 = F2D2 so 7.2 x 1 = F x 8
F = 0.9N, I am pretty much confused with the answer I worked out. If I am wrong or if I am right, please explain me the correct solution so that next time before solving questions of this type, I would be confident.

Thanks.
(Regards)

 

[TSny]

Both D1 and D2 should be distances as measured from the pivot point. Check to make sure you have the correct values for D1 and D2.

 

[Muhammad Danish]

Both D1 and D2 should be distances as measured from the pivot point. Check to make sure you have the correct values for D1 and D2.

Yes, the correct values of D1 and D2 are 1.0 cm and 8.0 cm respectively.

 

[TSny]

Yes, the correct values of D1 and D2 are 1.0 cm and 8.0 cm respectively.

What is the distance between the unknown force F and the pivot point?

 

[Muhammad Danish]

What is the distance between the unknown force F and the pivot point?

Oh, It will be 8+1= 9.0 cm?

 

[TSny]

Oh, It will be 8+1= 9.0 cm?

Yes.