# Thread: [SOLVED] Vectors and Torque

1. ## [SOLVED] Vectors and Torque

So the question asks: In each of the following diagrams, determine the magnitude of the moment of the force about the fixed point A.

The diagrams can be found here:

http://img54.imageshack.us/img54/1250/scan0003t.jpg

For question: a) I got 1.75 by using the torque formula T = |r| |F| sin x (correct me if I am mistaken)

B) I am not sure how to attempt. There are two distances to get to the force and angle of direction. Do i combine the distance and sub it into the formula using the force and angle stated in the diagram?

c) I believe it is the same scenario as B, however the force and angle are different.

How do i attempt question b and c?

2. your scanned picture leaves much to be desired.

4a. $\displaystyle \tau = (0.1) \cdot 35\sin(120^{\circ})$

4b. $\displaystyle \tau = (0.5) \cdot 35\sin\left[30^{\circ} + \arctan\left(\frac{4}{3}\right)\right]$

4c. $\displaystyle \tau = \sqrt{2} \cdot 100\sin(70^{\circ} + 45^{\circ})$