Question

The force of friction : A) acts only when an object is in motion B) acts equal and opposite to any net force on the object C) acts parallel to the surface a. A and B are correct b. B c. B and C are correct d. A e. A, B, and C are correct f. C

Answer 1

a. A and B are correct

Step-by-step explanation:

A is true because during the motion there is a force of friction ( if the mass at rest without any forces act on it, then the friction is zero).

B is also true because the force of friction is always opposite direction of motion ( force acts on the body to the right, then friction on the left).