Question

Explain the four mathard by which friction between two solids surfaces in contact can be reduce

Answer 1

The four methods by whichfriction between two solid surfaces in contact can be reduced are: By polishing – Polishing a rough surfacesmoothens it and reduces the friction. By lubrication – Lubricating thesurface with oil, grease or graphite decreases the friction between two surfaces.

Answer 2

The four methods can be :

1. $\textbf{By polishing the surfaces }$, rough surfaces can be made smooth by polishing.

2. $\textbf{By applying oil or trees on the surfaces }$, this reduces chance of interlocking of the two surfaces.

3. $\textbf{By sprinkling a soft, slippery fine powder on the surfaces }$.

4. $\textbf{By streamlining the body }$, these body shapes offers less friction.