A rectangular body is held at rest by pressing it against a vertical wall for which -1- Which of the following is generally true-

Since the block is in equilibrium, F=N (F: pressing force) mg = f_l nbsp;(f_l is limiting friction) mg =μ N mg = μ F F= mgμ F gt; mg since μ lt; 1 ...

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Byju's Answer

Standard XIII

Physics

Calculating Friction Using Coeffcients

A rectangular...

Question

A rectangular body is held at rest by pressing it against a vertical wall for which $μ < 1$ . Which of the following is generally true?

It will be easier to hold the body if the surfaces in contact are smooth.

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Pressing force required is smaller than weight

m g

of the body.

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Pressing force required is greater than weight

m g

of the body

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The required pressing force is independent of coefficient of friction between surfaces in contact.

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Solution

The correct option is C Pressing force required is greater than weight $m g$ of the body

Since the block is in equilibrium,
$F = N$ ( $F$ : pressing force)
$m g = f_{l}$ ( $f_{l}$ is limiting friction)
$m g = μ N$
$m g = μ F$
$F = \frac{m g}{μ}$
$F > m g$ since $μ < 1$

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A rectangular body is held at rest by pressing it against a vertical wall for which μ<1. Which of the following is generally true?

The correct option is C Pressing force required is greater than weight mg of the body Since the block is in equilibrium, F=N (F: pressing force) mg=fl (fl is limiting friction) mg=μN mg=μF F=mgμ F>mg since μ<1

A rectangular body is held at rest by pressing it against a vertical wall for which $μ < 1$ . Which of the following is generally true?

The correct option is C Pressing force required is greater than weight $m g$ of the body

Since the block is in equilibrium,
$F = N$ ( $F$ : pressing force)
$m g = f_{l}$ ( $f_{l}$ is limiting friction)
$m g = μ N$
$m g = μ F$
$F = \frac{m g}{μ}$
$F > m g$ since $μ < 1$