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Physics · LAWS OF MOTION

हिन्दी

A block of mass \( m \) is pulled along a horizontal rough surface (\( \mu_s \)) by a horizontal force \( F \). The normal force exerted by the surface on the block is:

  1. \( mg - F \)
  2. \( mg + F \)
  3. \( mg \)
  4. \( \mu_s mg \)

Correct answer · Option 3

\( mg \)

Explanation

Since the applied force is horizontal, vertical equilibrium gives \( N - mg = 0 \implies N = mg \).
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