Home
Class 9
PHYSICS
Friction is increased by..............

Friction is increased by...........

A

Lubrication

B

Powder sprinkled on cartom board

C

Smoothening the surface

D

Treading of tyres

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question "Friction is increased by...........", we need to analyze the options provided and understand the factors that can increase friction. ### Step-by-Step Solution: 1. **Understanding Friction**: Friction is a force that opposes the relative motion of two surfaces in contact. It can be influenced by various factors including the nature of the surfaces and the presence of lubricants. 2. **Identifying Factors that Affect Friction**: - **Lubrication**: The application of lubricants (like oil) reduces friction between surfaces. Therefore, lubrication does not increase friction. - **Smoothing the Surface**: Smoother surfaces tend to have less friction compared to rough surfaces. Hence, smoothing the surface also does not increase friction. - **Powder Sprinkling on Carom Board**: Sprinkling powder on a carom board is done to reduce friction, allowing the striker to move more freely. Thus, this action does not increase friction. - **Tearing of Tires**: The wear and tear of tires (the dot patterns on tires) increases the surface area in contact with the road, which increases friction. This is essential for vehicles to stop effectively. 3. **Conclusion**: Based on the analysis, the correct answer to the question "Friction is increased by..........." is **the tearing of tires**. ### Final Answer: Friction is increased by the tearing of tires. ---
To solve the question "Friction is increased by...........", we need to analyze the options provided and understand the factors that can increase friction. ### Step-by-Step Solution: 1. **Understanding Friction**: Friction is a force that opposes the relative motion of two surfaces in contact. It can be influenced by various factors including the nature of the surfaces and the presence of lubricants. 2. **Identifying Factors that Affect Friction**: ...
Promotional Banner

Topper's Solved these Questions

  • FORCES AND ITS TYPES (FRICTIONAL FORCE, GRAVITATIONAL FORCE, THRUST AND PRESSURE)

    AGRAWAL EXAM CART BIHAR|Exercise Important Questions|48 Videos

  • PRACTICE SET 03

    AGRAWAL EXAM CART BIHAR|Exercise SECTION - IV (GENERAL SCIENCE)|34 Videos

Similar Questions

Explore conceptually related problems

Friction is reduced/increased through use of roller.

TRUE/FALSE TYPE QUESTIONS: Frictional force gets increased when a surface is polished beyond a certain limit.

Four children were asked to arrange forces due to rolling, static and sliding frictions in increasing order. Their arrangements are given below. Choose the correct arrangement.

Why frictional force gets increased when two surfaces in contact are polished beyond a certain limit ?

Air friction increases the velocity of the sastellite. Explain.

Assertion : As the frictional force increases, the safe velocity limit for taking a turn on an unbanked road also increases. Reason : Banking of roads will increase the value of limiting velocity.

A : Work done by friction can increase the kinetic energy of the body. R : Friction is a type of contact force and it always opposes the relative motion or tendency of relative motion.

(A) : Polishing a surface beyond a certain limit increases rather than decreases the frictional forces . (R) : When the surface is polished beyond a certain limit , the molecules exert strong attractive force . This is called surface adhesion , to overcome which additional force is required . Hence frictional force increases .

A block is kept at rest on a rought ground as shown. Two force F_(1) and F_(2) are acting on it. If we increased either of the two force F_(1) and F_(2) , force of friction acting on the block will increase. By increasing F_(1) , normal reaction from ground will increase.