Which of the following statement is NOT correct regarding friction?
Show answer & explanation
Correct answer: D
Explanation
Correct Answer:
Option 4: Rolling increases the friction and hence the rolling friction is more than the sliding friction. (Incorrect statement)
Explanation:
The types of friction include static, sliding, and rolling friction. Scientifically, rolling friction is the lowest, while sliding friction is greater than rolling friction, and static friction is the highest. Therefore, the statement that 'friction increases with rolling' is incorrect. For this reason, wheels and ball bearings are used in vehicles and machines to reduce friction and facilitate smooth motion.
Potential Questions for Upcoming Exams:
Question: How many types of friction are there?
Answer: Three
Question: Which type of friction is the lowest?
Answer: Rolling friction
Question: Where is friction utilized?
Answer: Walking, applying brakes
Question: What are the methods to reduce friction?
Answer: Lubrication, ball bearings