Equilibrium of Forces - Jamb Physics Past Questions and Answers

Question 6:

• JAMB 1982

A Uniform beam PQ of mass 20kg and length 5m is balanced as shown above, a man of weight 800N stands at M such that QM = 2m. The reaction at P and Q respectively are(take g = 10ms^-2)

A. 300N and 500N
B. 420N and 580N
C. 220N and 380N
D. 580N and 420N
E. 382N and 220N

Question 7:

• JAMB 1985

Two masses 40g and 60g respectively, are attached firmly to the ends of the light meter rule. The center of gravity of the system is

A. At the mid-point of the meter rule
B. 40cm from the lighter mass
C. 40cm from the heavier mass
D. 60cm from the heavier mass
E. Indeterninate because the meter-rule is light

Question 8:

• JAMB 1986

Which of the following is in a neutral equilibrium?

A. A heavy weight suspended on a string
B. A cone resting on its slant edge
C. A heavy-based table lamp
D. The beam of a balance in use

Question 9:

• JAMB 1986

A constant force of magnitude F acts on an object of mass 0.04kg initially at rest at a point O. if the speed of the object when it has moved 50m from O is 500ms^-1, what is the value of F?

A. 0.4N
B. 100.0N
C. 250.0N
D. 1000.0N

Question 10:

• JAMB 1986

In fig 3, three forces F1, F2, and F3 acting at O are in equilibrium. If the magnitude of F1 is 10N,and the magnitude of F2 is 5N, find the magnitude of F3

A. 26.4N
B. 15.0N
C. 13.2N
D. 10.0N