Five Forces Act on a Rod That Is Free to Pivot

question 92

Multiple Choice

Five forces act on a rod that is free to pivot at point P, as shown in the figure. Which of these forces is producing a counter-clockwise torque about point P? (There could be more than one correct choice.)

• A) force A
• B) force B
• C) force C
• D) force D
• E) force E

---

Definitions:

Extraneous Variable

A variable that is not of interest in a study but may affect the outcome of the experiment if not controlled.

Control Group

In research, a control group is a group of subjects not exposed to the experimental treatment, used as a benchmark to measure the effect of the treatment.

Independent Variable

A variable that is manipulated in an experiment to see its effect on a dependent variable.

Observational Group

A group in a study that is exposed to the variable under investigation for observational purposes without receiving the experimental treatment.