Equilibrium of Forces - Jamb Physics Past Questions and Answers

Question 41:

• JAMB 2008

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

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

Question 42:

• JAMB 2008

The resultant of two forces 12N and 5N is 13N. What is the angle between the two forces?

A. 0^o
B. 45^o
C. 90^o
D. 180^o

Question 43:

• JAMB 2008

THe diagram above shows a plank RS pivoted its center of gravity O and is in equilibrium with the weight P and Q. If a weight 2P is added to P the plank will be in equilibrium again by

A. Moving Q nearer to O
B. Moving P nearer to O
C. Addding a weight Q to Q
D. Moving P further away from O

Question 44:

• JAMB 2010

The diagram above represents balls in an undulating surface. Which of the following option represents positions of stable equilibrium?

A. III, IV and VIII
B. II, V and VIII
C. III, VI and IX
D. I, IV and VII

Question 45:

• JAMB 2011

The diagram above show the positions of a cone. The position which can be described as neutral equilibrium is represented as

A. Z only
B. X only
C. Y and Z
D. Y and X