WBCS.LIVE practice question

The function of ball bearings in a wheel is-

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. to increase friction
  2. to convert kinetic friction into rolling friction
  3. to convert static friction into kinetic friction
  4. just for convenience

Correct answer and explanation

Correct answer: to convert kinetic friction into rolling friction