Finding Coefficient of Kinetic Friction for a Horizontal Force on a Wooden Desk

[temaire]

Homework Statement

A horizontal force of 50 N is required to pull and 8.0 kg block at a unifrom velocity across a horizontal wooden desk. Determine the coefficient of kinetic friction.

Homework Equations

$$F_{Net}$$=ma

The Attempt at a Solution

I put $$F_{Net}$$ as 0, because acceleration is 0. By doing this, I get the applied force and the force of friction both as 50, but I don't think that its right. By the way, the answer to the question is 0.64.

 

[BishopUser]

You are correct in finding that the force applied is equal to the kinetic friction, but you need another formula to relate the frictional force to the coefficient of friction.

 

[temaire]

What would that formula be?

 

[BishopUser]

Friction Force = (Coefficient of friction)*(Normal force)

 

[temaire]

Thanks for the formula, I got the answer.