Physics · LAWS OF MOTION

A 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 \( g = 9.8\text{ m s}^{-2} \))

1. A
   \( 14.7\text{ N} \)
2. B
   \( 19.6\text{ N} \)
3. C
   \( 4.9\text{ N} \)
4. D
   \( 9.8\text{ N} \)