Which kind of friction mainly occurs between the surface of a wheel or other round objects and another surface?
Sliding friction
Static friction
Fluid friction
Rolling friction
Rolling friction mainly occurs between the surface of a wheel or other round objects and another surface.
Ball bearing is a device which usually converts: (a) rolling friction into sliding friction (b) static friction into sliding friction (c) sliding friction into rolling friction (d) rolling friction into static friction
Which of the following statements is incorrect? (a) static friction is greater than rolling friction (b) sliding friction is less than rolling friction (c) rolling friction is less than static friction (d) static friction is greater than sliding friction
Out of sliding friction, static friction and rolling friction: (a) which one is the smallest ? (b) which one is the largest ?