Question

Comment on the direction of friction and why it is considered as contact force?
CLASS 8​
chapter 11 Force and pressure

Answer 1

Explanation:

Friction is a force exerted by a surface against the motion of a body across its surface.Friction is a type of contact force only. Applied Force: Force which is applied to an object by another object. A person pushing a barrel is an example of applied force.

Answer 2

Answer:

Another example, if a book slides across the surface of a desk, then the desk exerts a friction force in the opposite direction of its motion causing it to stop sliding after a finite distance. Friction is a type of contact force only. Applied Force: Force which is applied to an object by another object.