Given:
- Mass of the box:
- Coefficient of kinetic friction:
- Acceleration due to gravity:
Step 1: Calculate the Normal Force
The normal force acting on the box is equal to the weight of the box, given by:
Step 2: Calculate the Force of Kinetic Friction
The force of kinetic friction is given by:
Substituting the values:
Therefore, the force of kinetic friction is .
In the given LCR series circuit the quality factor is