Equilibrium of Forces - Jamb Physics Past Questions and Answers

Question 11:

• JAMB 1986

A uniform meter rule QR is balanced on a knife edge which is 55cm from R, when a mass of 10g is hung at P as shown above, the mass of the meter rule is

A. 550g
B. 350g
C. 70g
D. 35g

Question 12:

• JAMB 1987

the fig above shows two connected bodies of masses M1 and M2 in equilibrium under gravity. The tension in the upper string is

A. (m1-m2)g
B. M1g
C. M2g
D. (m1+m2)g

Question 13:

• JAMB 1989

The magnitude of the resultant of two mutually perpendicular forces, F₁ and F₂ is 13N, if the magnitude of F₁ is 5N, what is the magnitude of F₂?

A. 2.6N
B. 6.0N
C. 12.0N
D. 18.0N

Question 14:

• JAMB 1990

Which of the following statements are correct about an object in equilibrium under parallel forces? i. the total clockwise moments of the forces about any point equals the total anti-clockwise moments about the same point. ii. the total forces in one direction equals the total forces in the opposite direction. iii. the resolved components along the x-axis equals the resolved components along the y-axis.

A. I and ii only
B. I and iii only
C. Ii and iii
D. I, ii, and iii only

Question 15:

• JAMB 1990

Two horizontal forces, 10N and 8N and another force F1 inclined at 30 to the vertical acting as shown in the diagram above, keep the body P in equilibrium, The weight of the body is

A. 2√3/3N
B. √2N
C. 4√3/3
D. 2V3N