Equilibrium of Forces - Jamb Physics Past Questions and Answers

Question 16:

• JAMB 1991

A body of weight W N rest on a smooth plane inclined at an angle\(\theta\)^o to the horizontal. What is the resolved part of the weight in Newtons along the plane?

A. W sin\(\theta\)
B. W cos\(\theta\)
C. W sec\(\theta\)
D. W tan\(\theta\)

Question 17:

• JAMB 1991

A body of mass 100g moving with a velocity of 10.0ms-1 collides with a wall. If after collision, it moves with a velocity of 2.0ms-1 in the opposite direction, calculate the change in momentum.

A. 0.8Ns
B. 1.2Ns
C. 12.0Ns
D. 80.0Ns

Question 18:

• JAMB 1991

Find the tension T1 in the diagram above if the system is in equilibrium
[G = 10ms^-2]

A. 200/√3N
B. 100/√3N
C. 300/√3N
D. 100N

Question 19:

• JAMB 1992

A uniform light rod is kept in horizontal equilibrium under the influence of fore forces as shown above, which of the following equations correctly represents the condition of equilibrium for the rod

A. F1 + F2 = F3 + F4
B. F1 + F2 - F3 + F = 0
C. (F1 + F2)ab = (F3 + F4)cd
D. F1a + F2b - F3c - F4d = 0

Question 20:

• JAMB 1993

Two forces of magnitudes 7N and 3N act at right angles to each other. The angle \(\theta\) between the resultant and the 7N force is given by

A. Cos\(\theta\) = \(\frac{3}{7}\)
B. Sin\(\theta\) = \(\frac{3}{7}\)
C. Tan\(\theta\) = \(\frac{3}{7}\)
D. Cot\(\theta\) = \(\frac{3}{7}\)