Question

Which of the following method increases friction ?

• A. Grooving
• B. Streamlining
• C. Lubricating
• D. Using rollers

Answer 1

The correct option is A

Grooving

Option-A (Correct) Grooving:-

1. Friction can be increased by increasing the roughness of the surface and making grooves.
2. For example- We can increase the friction by making a groove in the tires of a bicycle, car, or bus.

Option-B ( Incorrect) Streamlining:-

1. A streamlined shape of an object reduces friction and it helps the boat or car to go quickly.

Option-C ( Incorrect) Lubricating:-

1. Lubricant is a substance that helps reduce friction between surfaces, so grease or oil is used to reduce friction.

Option-D (Incorrect) Using Rollers:-

1. When we place multiple rollers under the object, it is much easier to pull or push or move the object because the rollers reduce the friction.

Hence, option (A) is correct.