Question

28-1) The
2-1 What do
you understand by friction?
force that acts ofposite to the direction
of motion of the offect​

Answer 1

Answer:

Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction: ... Fluid friction describes the friction between layers of a viscous fluid that are moving relative to each other.

Answer 2

Answer:

Kinetic friction acts opposite the object's sliding direction. Kinetic friction always opposes the object's sliding direction. As seen in Figure 3 below, if an object is moving up an incline, the force of friction f k f_k fkf, start subscript, k, end subscript points down the incline.