Friction - Jamb Physics Past Questions and Answers

Question 11:

• JAMB 1994

Calculate the magnitude of the force required to just move a 20kg object along a horizontal surface if the coefficient of friction is 0.2. [g = 10ms^-2]

A. 400.0N
B. 40.0N
C. 4.0N
D. 0.4N

Question 12:

• JAMB 1995

Which of the following statements are TRUE about frictional force? i. it is always a disadvantage ii. it is sometimes a disadvantage iii. it always exist where there is a relative motion of two bodies that are in contact iv. it is sometimes very useful

A. I, iii only
B. I, iv only
C. Ii, iii only
D. Iii, iv only

Question 13:

• JAMB 1995

The value of T in the figure above is

A. 10.0N
B. 11.8N
C. 20.0N
D. 40.0N

Question 14:

• JAMB 1997

For a rough inclined plane on which lies a body of weight W, the angle θ in the diagram above becomes the angle of friction if

A. Tan θ = coefficient of static friction
B. Cos θ = coefficient of dynamic friction
C. Sin θ = coefficient of sliding friction
D. Sec θ = limiting frictional force

Question 15:

• JAMB 2002

A bead travelling on a straight line wire is brought to rest at 0.2 by friction. If the mass of the bead is 0.01kg and the coefficient of friction between the bead and the wire is 0.1, determine the work done by the friction
[g = 10ms\(^2\)]

A. 2 x 10\(^{-4}\)
B. 2 x 10\(^{-3}\)
C. 2 x 10\(^{-1}\)
D. 2 x 10\(^2\)