Question

Increasing friction is necessary for which of the following?

• A. Treading the tires
• B. Sprinkling power on carom board
• C. Greasing the machines
• D. All of the above

Answer 1

The correct option is A

Treading the tires

Explanation for Correct Option:

Option (A):

1. Friction is a resistive force that opposes the motion of a body.
2. It occurs at the surface that is in contact with the moving object.
3. This phenomenon occurs according to Newton's third law of motion which states that every action has an equal and opposite reaction.
4. Heat is generated at this surface of contact due to the opposing force of friction.
5. These causes wear and tear on the material of the moving body.
6. It is also a necessary phenomenon as it helps to stop or reduce the velocity of a moving body.
7. Hence, increasing the friction is necessary for treading the tires.

Explanation for Incorrect Option:

Option (B):

1. When the carrom pieces are hit and set in motion, the surface between the carrom pieces and carrom board generates friction.
2. This opposes the movement of these pieces and therefore friction needs to be reduced.
3. Hence, power is sprinkled on the carrom board to decrease friction.

Option (C):

1. There is friction present between the parts of a machine.
2. This causes damage to the machines and they do not work properly.
3. Hence, grease is applied to the machines to reduce friction.

Option (D):

1. Since two options are not correct, all of the above can not be a correct option.

Hence, option A is the correct answer.