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Calculating Friction Using Coeffcients

A continuousl...

Question

A continuously increasing horizontal force (from zero) is applied on a block initially at rest on a horizontal surface. The initial slope of force applied vs friction graph is

A

0.5

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B

1

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C

μ

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D

\frac{μ}{2}

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Solution

The correct option is B 1
Initially friction force is equal to applied force parallel to surface

Initially, f = F

After F > $μ$ N, F will increase but
f will remain $μ N$

Slope = ${tan}^{- 1} 45 = 1$

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