Question

How can we reduce friction in between two objects?​

Answer 1

There are several ways to reduce friction:

1...The use of bearing surfaces that are themselves sacrificial, such as low shear materials, of which lead/copper journal bearings are an example.

2....Replace sliding friction with rolling element friction, such as with the use of rolling element bearings.

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Answer 2

Answer:

by making the friction slippery

I think.