- Home
- Standard 11
- Physics
4-2.Friction
medium
Find the minimum value of $m$ that should placed on $20\, kg$, so that system remain at rest ........ $kg$
A$10$
B$20$
C$30$
D$40$
Solution
$10 \mathrm{g}=\mu(\mathrm{m}+20) \mathrm{g}$
$\Rightarrow 10=0.25(\mathrm{m}+20) \Rightarrow \mathrm{m}=20 \mathrm{kg}$
$\Rightarrow 10=0.25(\mathrm{m}+20) \Rightarrow \mathrm{m}=20 \mathrm{kg}$
Standard 11
Physics