Question

Force required to move a mass of 1 kg at rest on a horizontal rough plane ($\mu =0.1$ and $g=9.8m{s}^{-2}$) is:

• A. 0.98 N
• B. 0.49 N
• C. 9.8 N
• D. 4.9 N

Answer 1

Answer: (A)

0.98 N

Given that $\mu =0.1$ and $g=9.8m/s^2$
So, $F=f_r=\mu N=\mu mg$
$=0.1\times 1\times 9.8=0.98N$