Question 6 of 10intermediate💡 UnderstandShort Answer3 marks

Why do we sometimes slip on smooth surfaces like ice or polished floors? Explain.

Correct Answer

We slip on smooth surfaces like ice or polished floors because these surfaces have very few irregularities.

Friction arises due to the irregularities between two surfaces in contact. When surfaces are smooth, there are fewer irregularities to interlock with each other, resulting in very low friction.

With less friction, there is reduced grip between our feet and the surface, making it difficult to maintain balance and causing us to slip.

Exercise: Keep the curiosity alive | Q: 7 | (Page Page 17)
For More Understanding

Explanation

The chapter explains that 'Friction arises due to the irregularities in the two surfaces in contact' and that 'Even surfaces which appear smooth, have a large number of minute irregularities.' When surfaces are very smooth, these irregularities are minimal, leading to less friction.

Solution Steps

  1. Smooth surfaces like ice and polished floors have very few irregularities

  2. Friction arises due to irregularities between two surfaces in contact

  3. Fewer irregularities means less interlocking, resulting in very low friction

  4. Low friction leads to reduced grip, making it difficult to maintain balance and causing slipping

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