Statement 1: Sliding friction is less than the maximum value of static friction.

Statement 2: Frictional force acts only when the surfaces are in contact.

Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1.

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Both statements 1 and 2 are correct and statement 2 is not the correct explanation of statement 1.

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Statement 1 is correct but statement 2 is incorrect.

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Statement 1 is incorrect but statement 2 is correct.

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Solution

The correct option is B Both statements 1 and 2 are correct and statement 2 is not the correct explanation of statement 1.
Sliding friction is less than the maximum value of static friction.
Frictional forces act only between bodies in contact. However, this does not explain statement 1.

Sliding friction acts when body slides on the surface and hence irregularities do not properly interlock with each other as they interlock when object is at rest on surface. Hence, sliding friction is less than the maximum static friction.

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Similar questions

Q. A book is lying on the horizontal table top. If we tilt the table a little, then the book starts sliding down slowly. This happens because:
(a) sliding friction is greater than static friction
(b) sliding friction is less than force of gravity
(c) static friction is greater than sliding friction
(d) force of gravity is less than sliding friction

Which of the following statements is incorrect?
(a) static friction is greater than rolling friction
(b) sliding friction is less than rolling friction
(c) rolling friction is less than static friction
(d) static friction is greater than sliding friction

Q. Statement 1: Frictional force can act between surfaces even when they are not in contact.

Statement 2: Friction is a contact force.

Q. Statement 1: Sliding friction is greater than rolling friction.

Statement 2: Sliding friction is greater than static friction.

Which of the following statement(s) is/are correct?

Q. A wooden block kept on concrete was initially at rest. When a force of 20 N acts on it, the block starts to move in the direction of force. Which of the following is correct for the friction on the block when it is moving?

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Statement 1: Sliding friction is less than the maximum value of static friction. Statement 2: Frictional force acts only when the surfaces are in contact.

Statement 1: Sliding friction is less than the maximum value of static friction.

Statement 2: Frictional force acts only when the surfaces are in contact.