How are ball bearings used to reduce friction?

Options :
  1. By applying lubricants to the balls used.
  2. By reducing the area of contact with the use of metallic balls.
  3. By increasing the area of contact with the use of metallic balls.
  4. None of these.
Answer and Explanation :-

Answer: Option 2


Sorry there is no explanation for this answer. Please help others by posting your response below

How do you rate this queston?  Very Easy  Easy  Average  Above Average  Tough

Previous Question : Conversion of heat energy to electrical energy can be achieved by the use of which of the following?

Next Question : Which of the following laws of Physics can be applied to the recoil of a gun?

Click here for online test on General Science


 (Getemail alerts when others member replies)

Let us try to teach generosity and altruism, because we are born selfish. Let us understand what our own selfish genes are up to, because we may then at least have the chance to upset their designs, something that no other species has ever aspired to do.
-Richard Dawkins The Selfish Gene