Question

1. what is friction?

Explanation:

Friction is a force that opposes the relative motion between two surfaces in contact. It arises due to the irregularities in the surfaces and can be classified into different types like static friction (prevents motion), kinetic friction (opposes motion when already moving), sliding friction, and rolling friction. It has both advantages (e.g., helps in walking, braking) and disadvantages (causes wear and tear, energy loss).

Answer:

Friction is a force that opposes the relative motion between two surfaces in contact.