Why does a matchstick catch fire when struck against a rough surface?
Show answer & explanation
Correct answer: B
Explanation
Correct Answer:
Because friction produces heat
Explanation:
When a machine belt rubs against a rough surface, friction is generated. This friction converts mechanical energy into heat, causing the belt to become hot and increasing the chances of it burning.
Key Points:
• Cause: Friction
• Result: Heat generation
• Effect: Belt may burn
• Surface: Rough surfaces increase friction
Additional Facts:
• Friction converts energy into heat.
• Lubricants (oil/grease) are used in machines to reduce friction.
Important Exam Questions:
Why can a machine belt burn?
Answer: Due to heat produced by friction
What is the main effect of friction?
Answer: Heat generation