Question

30. Friction always ________________.

a. Produces heat b. Reducing the speed

b. Wearing the objects d. None of these​

Answer 1

Answer:

PLZ MARK AS BRAINLIEST !

Explanation:

Friction always works in the direction opposite to the direction in which the object is moving, or trying to move. Friction always slows a moving object down. The amount of friction depends on the materials from which the two surfaces are made. The rougher the surface, the more friction is produced.

Answer 2

The direction of friction is always opposite that of motion, parallel to the surface between objects, and perpendicular to the normal force.