Question

What does it imply and Why? If acceleration of a body is zero ms⁻²

Answer 1

it implies that body is moving with constatnt velocity.

Answer 2

The appropriate word that is used to fill in the blanks given is the word reduces.

It is the lubricants that smoothen the surface due to the oily and greasy nature and reduces friction two surfaces.

We can see the smooth running of any object centering another when the moving parts are lubricated.