10th Class Karachi Board Exams Quizzes MCQs Quizzes Karachi Board 10th Class Physics Online Test 6

Question:
Friction can be decreased by using ball bearings because they ________.

Option A):
Make the surface plane
Option B):
Have no friction of friction of their own
Option C):
Make the surface greasy
Option D):
Convert sliding friction into rolling friction

Correct Answer is Option D):
Convert sliding friction into rolling friction