Frictional Force on Empty Chair vs. Occupied Chair
Frictional force is the force that resists the relative motion of an object in contact with another object. In the case of dragging two chairs, one empty and the other occupied, the frictional force exerted on each chair differs. Let's explore why.

Frictional Force on the Occupied Chair
- The occupied chair will experience more frictional force compared to the empty chair.
- This is because the weight of the person sitting on the chair increases the normal force between the chair and the ground.
- The normal force is directly proportional to the frictional force according to the equation Ffriction = μ * FN, where μ is the coefficient of friction.
- With a greater normal force on the occupied chair, the frictional force will be higher as well.
- As a result, more force will be required to drag the occupied chair due to the increased friction.

Frictional Force on the Empty Chair
- The empty chair, on the other hand, will experience less frictional force.
- Since there is no additional weight on the chair, the normal force between the chair and the ground is lower.
- Consequently, the frictional force acting on the empty chair will be less compared to the occupied chair.
- The lower frictional force makes it easier to drag the empty chair as there is less resistance to its motion.
In conclusion, the occupied chair will have more frictional force exerted on it due to the increased normal force resulting from the weight of the person sitting on it. The empty chair, on the other hand, will experience less frictional force because of the lower normal force acting on it.