leannaheath
contestada

1.) Ball bearings are placed between skateboard wheels and other moving parts because _____.

A) static friction is easier to overcome than sliding friction
B) fluid friction is easier to overcome than rolling friction
C) rolling friction is easier to overcome than sliding friction
D) sliding friction is easier to overcome than rolling friction

Respuesta :

the correct choice is

C) rolling friction is easier to overcome than sliding friction

sliding friction acts when two surfaces are in contact with each and they slide over each other. rolling friction acts when one surface rolls over the other surface. in this situation , are in contact is small  and circular which makes the rolling friction smaller as compared to the sliding friction.

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