Question

70.
Identify the incorrect statement.
(1)
Ball bearings are used to increase
friction between parts of a machine.
(2)
Friction between two surfaces in
contact can never be eliminated
on earth.
(3)
Rolling friction is less than sliding
friction
(4)
The friction force on an object
moving through a fluid depends
upon its shape.​

Answer 1

Answer:

2.

friction between two surfaces in contact can never be eliminated on earth

Explanation:

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