This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Ways to reduce friction
1. by applying oil or Greece
2. by smoothing the surface
3. using ball bearings
4. using fluids
5.snow skin can also used to reduce friction

Ways to increase friction
1 . by using grip for shoes and Tyre 
2. adding weight to object 
3 . removing lubricants from the object