JAMB Physics 2009 Objective — Question 9

Question 9 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2009 Objective paper, with the correct answer and a full explanation.

9. I. All three forces must be concurrent II. The upward force is equal to the downward force III. The algebraic sum of the moment at any point must be zero. Which of the above conditions must hold for a body acted upon by a system of three coplanar forces in equilibrium?

A. I and II only
B. I and III only
C. II and III onlyCorrect
D. I, II and III

Explanation

For a body in equilibrium under coplanar forces: total upward forces must equal downward forces, and the algebraic sum of moments about any point must be zero. Concurrency is not a strict requirement.

Sign up free to unlock

Score tracking
Practice history
Saved questions
Progress dashboard
Personalized sessions
Weak-topic breakdown

…and/or go further with premium services and No Ads.

Create free account

More questions from Physics 2009 Objective More Physics past papers