Physics > 2000 > 3
JAMB UTME
I. The frictional force is independent of the area of the surface in contact.
II. The frictional force depends on the nature of the surface in contact.
III. The frictional force depends on the speed of sliding.
IV. The frictional force is directly proportional to the normal reaction.
Which combination of the above is true of sliding friction?
II. The frictional force depends on the nature of the surface in contact.
III. The frictional force depends on the speed of sliding.
IV. The frictional force is directly proportional to the normal reaction.
Which combination of the above is true of sliding friction?
A.
I, II and IV
B.
I, II and III
C.
I, III and IV
D.
II, III and IV
Answer: A
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