Q. Force required to move a mass of 1 kg at rest on a horizontal rough plane $(\mu = 0.1$ and $g = 9.8\ {ms}^{- 2})$ is
A) 0.98 N
B) 0.49 N
C) 9.8 N
D) 4.9 N
Explanation
(a) [image:5_image235.jpeg]
Given that, $\mu = 0.1\ $and $g = 9.8\ {ms}^{- 2}$
So, $F = f_{r} = \mu\ N = \mu\ mg$
$= 0.1 \times 1 \times 9.8 = 0.98$ N
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.