The coefficient of friction between object and substance, if we need to move an object of weight $150…
The coefficient of friction between object and substance, if we need to move an object of weight $150 \mathrm{~N}$ on a horizontal surface with a force of $75 \mathrm{~N}$, is
0.8
0.5
0.7
0.9
Solution
For the given object to move
$
\begin{aligned}
& \mu \mathrm{mg}=\mathrm{F} \\
\Rightarrow & \mu \times 150=75 \\
\Rightarrow & \mu=0.5
\end{aligned}
$