Question

Collect at least six objects of different materials. Check them for their friction by sliding an object on their surfaces. Now arrange them according to their friction (high to low). How their friction can be reduced? Suggest some methods according to the materials.​

Answer 1

Answer:

Friction will be high in objects where its surface area is rough and will be less in objects with smooth surface area Therefore if the object slides fast less friction if it slides slow more friction.

Their friction can be reduced by smoothing out the two surfaces that is the object and where its about to slide, This can be done by adding another medium like oil and so or smoothing the surfaces or reducing the mass as frictional force is equal meu times reaction force i.e. mass in gravitational acceleration