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JEE Main 2003 (AIEEE) · Friction Basics

Friction Basics question from JEE Main 2003 (AIEEE)

Q34JEE Main 2003 · AIEEEEasy

Friction Basics

A horizontal force of $10\text{ N}$ is necessary to just hold a block stationary against a wall. The coefficient of friction between the block and the wall is $0.2$ . The weight of the block is

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Answer: (d)

The wall's normal force equals the applied force: $N = 10$ N.
To just hold the block, friction balances the weight: $W = \mu N$
$W = 0.2 \times 10 = 2$ N, so the answer is (d).

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