JAMB - Physics (2003 - No. 5)
If an object just begins to slide on a surface inclined at 30o to the horizontal,the coefficient of friction is
√3
√3/2
1/√2
1/√3
คำอธิบาย
A body sliding down a plane inclined at 30o to the horizontal, has coefficient of friction
= tan 30o = 1/√3
= tan 30o = 1/√3