Q. Force required to move a mass of $1\ kg$ at rest on a horizontal rough plane $(\mu = 0.1$ and $g = 9.8\ m/s^{2})$ is
A) $0.98\ N$
B) $0.49\ N$
C) $9.8\ N$
D) $4.9\ N$
Explanation
(a) $F = f_{r} = \mu N = \mu mg = 0.1 \times 1 \times 9.8 = 0.98\ N$
(Assuming that the value of $\mu = 0.1$ is the coefficient of static friction)
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Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.