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Physics · LAWS OF MOTION
हिन्दीA body of mass \( 10\text{ kg} \) is sliding on a horizontal plane with kinetic friction coefficient \( \mu_k = 0.2 \). If an external horizontal force of \( 30\text{ N} \) is pulled on it, the acceleration of the body is (Take \( g = 10\text{ m s}^{-2} \)):
Correct answer · Option 1
\( 1.0\text{ m s}^{-2} \)
Explanation
Kinetic frictional force \( f_k = \mu_k N = 0.2 \times 10 \times 10 = 20\text{ N} \). Acceleration \( a = \frac{F - f_k}{m} = \frac{30 - 20}{10} = 1.0\text{ m s}^{-2} \).
