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Which physical phenomenon is primarily responsible for dynamic friction?
24. Which physical phenomenon is primarily responsible for dynamic friction?
- Adhesion between surfaces
- Cohesion within the material
- Electrostatic forces between surfaces
- Gravity acting on the surfaces
Answer
The correct answer is: A) Adhesion between surfaces
Explanation
Dynamic friction occurs mainly by adhesive forces between the contacting surfaces. When two surfaces come into contact, molecules at the interface prefer to attach, producing frictional resistance.