Given :
A 50 kg boy stands on rough horizontal ground. The coefficient of static friction, us, is 0.68.
To Find :
The maximum static friction between the boy and the ground is _ N.
Solution :
We know maximum static friction is given by :
![F = \mu mg \\\\F= 0.68* 50* 9.8\\\\F = 333.2\ N](https://img.qammunity.org/2021/formulas/physics/college/lh82h1dgv3e8vcbf26s8n6aml3wn3y3f31.png)
Therefore, maximum static friction is 333.2 N.
Hence, this is the required solution.