Question

D.All of the following can reduce friction except 

concrete

oil

grease

water​

Answer 1

Answer:

the answer is concrete

Explanation:

OIL, GREASE, WATER reduces the friction by reducing the irregularities between the surfaces

whereas concrete increases the friction by increasing the irregularities between the surface

Answer 2

All of the following can reduce friction except concrete.

Detailed answer

Concrete does not reduce friction but increases the frictional force between the objects.

• We use concrete as roads to pave paths as it has a good grip between its surface and the tires in contact.
• All the other options decrease or reduce the frictional force between the objects.
• The Frictional force is the opposing force that acts in the opposite direction of the motion of the body.