Friction (horizontal) Applied Greater Force than Equilibrium

[PraetorGT]

Homework Statement

When you apply a horizontal force of 44 N o a block, the block moves across the floor at a constant speed (μk = μs). When you apply a force of 50 N, what is the magnitude of the horizontal component of the force that the floor exerts on the block?

Homework Equations

f_friction ≈ μ_kF_N

The Attempt at a Solution

I'm not sure how to go about this. If the question asks for the horizontal force, do I still need to use the force of gravity in my calculations?

An explanation is appreciated, with or without the answer. I want to know how to do this, not necessarily know what the answer is.

 

[PhanthomJay]

Homework Statement

When you apply a horizontal force of 44 N o a block, the block moves across the floor at a constant speed (μk = μs). When you apply a force of 50 N, what is the magnitude of the horizontal component of the force that the floor exerts on the block?

Homework Equations

f_friction ≈ μ_kF_N

The Attempt at a Solution

I'm not sure how to go about this. If the question asks for the horizontal force, do I still need to use the force of gravity in my calculations?

An explanation is appreciated, with or without the answer. I want to know how to do this, not necessarily know what the answer is.

The floor exerts both a perpendicular (Normal) force in the vertical y direction, and a friction force in the horizontal direction, opposite the relative motion between the block and floor. The book is looking for the horizontal force component of the floor on the block.