help in physics pleaxse

Question

An 2 kg wooden block slides across a horizontal wooden floor at constant velocity.What is the magnitude of the force of kinetic friction between the block and the floor?

Answer 1

Friction is defined as the product of the normal force and friction coefficient.

On a horizontal surface, the normal force is equal to the weight. So in this case:

2kg * 10m/s/s = 20N

We do not know the friction coefficient from what is stated in the problem, but if we did, we could get our answer with:

20N * friction coefficient = friction force