Question

6.
A block is sliding on a horizontal surface. The force of friction between the two
can be increased by
decreasing the area of contact of the block with the surface.
applying a layer of some lubricant on the surface.
by polishing the surface.
by putting a second identical block on top of the given block.
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Answer 1

Answer:by putting a second identical block on top of the given block.

Explanation:

Answer 2

Answer:

V.Good!!!

The correct answer