Question

In a large commercial complex, there are four ways to reach the main road. One of the paths has loose soil, the second is laid with polished marble, the third is laid with bricks and the fourth has a gravel surface. It is raining heavily and Paheli wishes to reach the main road. The path on which she is least likely to slip is

• A. Loose soil
• B. Polished marble
• C. Bricks
• D. Gravel

Answer 1

The correct option is D

Gravel

Frictional force

1. When two surfaces collide and slide against one another, frictional force is created.
2. These pressures are heavily influenced by the surface texture and the amount of effort required to bring them together.
3. The angle and position of the object have an impact on the volume of frictional force.
4. Friction between objects is caused by the forces of attraction, known as adhesion, between the sites of contact areas of the surfaces, which are always minutely unequal.
5. Friction is caused by shearing these "fused" joints, as well as imperfections in the harder surface tilling across the softer surface.

Gravel surface

1. The gravel used consists of varying amounts of crushed stone, sand, and fines.
2. The surface of the gravel road is rough.
3. The contact area is rough on gravel surfaces thus the friction is more.

Therefore, she should use a gravel surface path because only on this path she will have sufficient friction force to walk easily.

Hence, option D is the correct answer.