Friction - Jamb Physics Past Questions and Answers

Question 16:

• JAMB 2003

If an object just begins to slide on a surface inclined at 30^o to the horizontal,the coefficient of friction is

A. √3
B. ^√3/₂
C. ¹/_√2
D. ¹/_√3

Question 17:

• JAMB 2003

A bead traveling on a straight wire is brought to rest at 0.2m 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

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

Question 18:

• JAMB 2004

A 100kg box is pushed along a road with force of 500N. If the box moves with a uniform velocity, the coefficient of friction between the box and the road is

A. 0.4
B. 1.0
C. 0.8
D. 0.5

Question 19:

• JAMB 2005

In the figure above, the coefficient of static friction is 0.5. If the tension in the string is T, the acceleration of the system in motion is

A. 5 ms^-2
B. 15 ms^-2
C. 3 ms^-2
D. 9 ms^-2

Question 20:

• JAMB 2006

A mirror of weight 75N is hung by a cord from a hook on the wall. If the cord makes an angle of 30^o with horizontal, the tension in the cord is

A. 100N
B. 1500N
C. 250N
D. 150N