Question

In a large commercial complex there are four ways to reach the
main road. One of the path has loose soil, the second is laid with
polished marble, the third is laid with bricks and the fourth has
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. (c) bricks.
(b) polished marble. (d) gravel.


NCERT Class VIII
Science - Exemplar Problems

Chapter 12. Friction

Answer 1

the answer is gravel because the contact area is rough thus the friction is more

Answer 2

Answer:

Gravel

Explanation:

Paheli is least likely to slip on gravel surface because:

⇒ The surface of gravel is rough.

⇒ Friction increases when a surface is rough.

⇒ Thus, there will be enough force of friction for her to walk easily without getting slipped.