Question

A wooden block of 100 kg is about to be published on a floor of coefficient of friction 0.4. What is the magnitude of force of friction on wooden block when it is just pushed?

Answer 1

$NormalForce$
$\Rightarrow 100kg\times 9.8m/s^2$
$\Rightarrow 980N$
$\mu =0.4$
Frictional Force,
$f=\mu N$

$\Rightarrow \left(0.4\right)\left(980\right)$
$\Rightarrow 392N$