12. Friction Class 8 Science [LATEST] Solutions Additional Questions With Solutions in English - CBSE Study
NCERT Solutions for Class 8 Science are carefully prepared according to the latest CBSE syllabus and NCERT textbooks to help students understand every concept clearly. These solutions cover all important 12. Friction with detailed explanations and step-by-step answers for better exam preparation. Each Additional Questions With Solutions is explained in simple language so that students can easily grasp the fundamentals and improve their academic performance. The study material is designed to support daily homework, revision practice, and final exam preparation for Class 8 students. With accurate answers, concept clarity, and structured content, these NCERT solutions help learners build confidence and score higher marks in their examinations. Whether you are revising a specific topic or preparing an entire chapter, this resource provides reliable and syllabus-based guidance for complete success in Science.
Class 8 English Medium Science All Chapters:
12. Friction
4. Additional Questions With Solutions
Additional - Question:
Que: What is the force of friction?
Ans: The force acting on a moving object equal and opposite to the direction of motion is called force of friction.
Que: What is the cause of friction?
Ans: The irregularities on the two surfaces in contact is the cause of friction.
Que: What is the force responsible for wearing out of bicycles tyres?
Ans: Frictional force.
Que: Why are wheels of vehicles made circular?
Ans: Rolling friction is less than sliding friction.
Que: What is the direction of force of friction acting on a moving object?
Ans: Opposite to the direction of moving objects.
Que: Why do pieces of luggage fitted with rollers?
Ans: To reduce friction and to pull them easily.
Que: Why does a matchstick catch fire when rubbed on the rough surface of the box?
Ans: Due to friction between the stick and rough surface a matchstick catches fire.
Que: What is the name of special shape given to objects moving in fluids?
Ans: Streamlined.
Que: Which surface does produce more friction—smooth or rough surface?
Ans: Rough surface
Que: Why is fine powder sprinkled on the carrom board?
Ans: In order to reduce friction powder is sprinkled on carrom board.
Que: Why is it difficult to walk on the wet marble floor?
Ans: The wet marble floor has less friction. So it is difficult to move on it.
Que: Why does the jar of a mixer become hot when it is run for few minutes?
Ans: It becomes hot due to friction.
Que: Name the types of friction.
Ans:
- Static friction
- Sliding friction
- Rolling friction
- Fluid friction
Que: Which force helps us to write on the paper or blackboard?
Ans: Frictional force
Que: What is drag?
Ans: The frictional force exerted by fluids is called drag.
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