Answer
The correct answer is:
(a) 3 only
Work Step by Step
Let's imagine standing on the axis and drawing a line to the point where each force is applied.
If the force points toward the left (from our point of view standing on the axis), the force produces a counterclockwise torque.
If the force points toward the right (from our point of view standing on the axis), the force produces a clockwise torque.
From the point of view of the axis, only force 3 points toward the right.
The correct answer is:
(a) 3 only
