which of these actions will increase friction? select three options. scratching a surface to make it rougher…

which of these actions will increase friction? select three options. scratching a surface to make it rougher polishing a surface to make it smoother increasing the size of a flying object adding extra weight to an object placing oil between two surfaces

which of these actions will increase friction? select three options. scratching a surface to make it rougher polishing a surface to make it smoother increasing the size of a flying object adding extra weight to an object placing oil between two surfaces

Answer

Answer:

A. scratching a surface to make it rougher, C. increasing the size of a flying object, D. adding extra weight to an object

Explanation:

Step1: Understand friction factors

Friction depends on surface - roughness and normal force.

Step2: Analyze option A

Scratching makes surface rougher, increases friction.

Step3: Analyze option B

Polishing makes surface smoother, decreases friction.

Step4: Analyze option C

Increasing size of flying object increases air - resistance (a form of friction), increases friction.

Step5: Analyze option D

Adding extra weight increases normal force, increases friction.

Step6: Analyze option E

Placing oil is lubrication, decreases friction.