Question

Given below are two statements :
Statement (I) : The limiting force of static friction depends on the area of contact and independent of materials.
Statement (II) : The limiting force of kinetic friction is independent of the area of contact and depends on materials.
In the light of the above statements, choose the most appropriate answer from the options given below :

• A. Statement I is correct but Statement II is incorrect
• B. Statement I is incorrect but Statement II is correct
• C. Both Statement I and Statement II are incorrect
• D. Both Statement I and Statement II are correct

Answer 1

Answer: (B)

Statement I is incorrect but Statement II is correct

Answer 2

The limiting force of static friction depends on the normal force and the materials in contact, but it does not depend on the area of contact. On the other hand, the limiting force of kinetic friction also depends on the nature of the materials in contact and is independent of the area of contact. Therefore, Statement I is incorrect, while Statement II is correct.
The correct option is (B) : Statement I is incorrect but Statement II is correct