Question

Friction can be increased by ___________

a) Using air cushion

b) Lubricants

c) Using sand

d) Using ball bearings

Answer 1

Answer:

c) Using Sand

Others are used to DECREASE friction.

Explanation:

Hope This Helped You

Answer 2

Explanation:

Friction can be increased by increasing the roughness of the surfaces in contact. For example, treading of shoes and tires is done to increase friction.