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Physics · LAWS OF MOTION
हिन्दीA horizontal force \( F \) is applied to a block of mass \( 2\text{ kg} \) resting on a horizontal floor with static friction coefficient \( \mu_s = 0.5 \). What is the minimum force \( F \) needed to just start moving the block? (Take \( g = 9.8\text{ m s}^{-2} \))
Correct answer · Option 4
\( 9.8\text{ N} \)
Explanation
Minimum force required to start motion equals maximum static friction: \( F_{\text{min}} = \mu_s N = \mu_s mg = 0.5 \times 2 \times 9.8 = 9.8\text{ N} \).
