Question

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

Answer 1

Answer: (A)

$0.98$ N

Answer 2

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