These questions consists of two statemen...

These questions consists of two statements each printed as Assertion and Reason. While answering these question you are required to choose any one of the following four responses
Assertion Static friction acting on a body is always greater than the kinetic friction acting on this body.
Reason Coefficient of static friction is more than the coefficient of kinetic friction.

If both Assertion and reason are true and the reason is a correct explanation of the assertion.

If both Assertion and reason are true and the reason is not the correct explanation of the assertion.

if assertion is true but reason is false

if assertion is false but reason is true

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To solve the question regarding the assertion and reason about static and kinetic friction, we will analyze both statements step by step. ### Step 1: Understand the Assertion The assertion states: "Static friction acting on a body is always greater than the kinetic friction acting on this body." - **Analysis**: Static friction is the frictional force that prevents motion between two surfaces in contact when no relative motion exists. Kinetic friction, on the other hand, acts when there is relative motion between the surfaces. ### Step 2: Understand the Reason The reason states: "Coefficient of static friction is more than the coefficient of kinetic friction." - **Analysis**: The coefficient of static friction (μs) is indeed generally greater than the coefficient of kinetic friction (μk). This means that the maximum static friction force that can act before motion occurs is greater than the friction force acting during motion. ### Step 3: Compare the Two Statements - **Static Friction**: The maximum value of static friction is equal to the limiting friction (FL = μs * N), where N is the normal force. Static friction can range from 0 to this maximum value. - **Kinetic Friction**: The kinetic friction force is given by Fk = μk * N, which is constant when the object is in motion. ### Step 4: Conclusion on Assertion - The assertion that static friction is always greater than kinetic friction is **not true**. While the maximum static friction can be greater than kinetic friction, static friction can also be zero when no external force is applied. Therefore, static friction is not always greater than kinetic friction. ### Step 5: Conclusion on Reason - The reason is correct: the coefficient of static friction is indeed greater than the coefficient of kinetic friction. ### Final Answer - The assertion is **false**, while the reason is **true**. Therefore, the correct option is **B**: Assertion is false, Reason is true.

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