Coefficient of limiting friction and its determination - Jamb Physics Past Questions and Answers

Question 11:

• 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 12:

• 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 13:

• JAMB 2008

A motorcycle of mass 100kg moves round in a circle of radius 10m with a velocity of 5 ms^-1. find the coefficient of friction between the road and the tyres.

A. 25.00
B. 2.50
C. 0.50
D. 0.25

Question 14:

• JAMB 2009

An object of mass 80 kg is pulled on a horizontal rough ground by a force of 500 N. Find the coefficient of static friction.
[g = 10 ms^-2]

A. 0.8
B. 0.4
C. 1.0
D. 0.6

Question 15:

• JAMB 2013

The coefficient of friction between two perfectly smooth surface is

A. Infinity
B. One
C. Half
D. Zero