Question

22. Which of the following can reduce
friction?
O retreading the tyre
O Putting engine oil in engine
O Putting rubber grip on cycle handle
O Using towel to open bottle cap​

Answer 1

Answer:

There are several ways to reduce friction: The use of bearing surfaces that are themselves sacrificial, such as low shear materials, of which lead/copper journal bearings are an example. Replace sliding friction with rolling element friction, such as with the use of rolling element bearings.

Answer 2

Answer:

putting engine oil in engine

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