Question

what is friction? why it is usefull to us ​

Answer 1

Answer:

without friction we couldn't walk on ground it is roughness required for our eligibility to walk

Answer 2

Answer:

Friction is the force that opposes relative motion of surfaces incontact. Friction acts on all moving objects

Usefullness

• Friction allows to make proper grip
• It allows to walk over the surface and catch different things.
• Objects will not move from its place due to friction between surfaces.