Physics Friction lab question?

Question

Explain how to find the coefficient of kinetic friction between a wooden block of unknown mass and a tabletop in the laboratory. Include the following in your explanation:
*Measurements required
*Equipment needed
*Procedure
*Equation(s) needed to calculate the coefficient of friction.

Answer 1

Materials:

Wooden block of unknown mass
Table
Light string
Pulley
Mass set

Procedure:

Tie the string to the wooden block. Attach the pulley to the edge of the table. Attach the string to the block and run it across the top of the pulley. Suspend known masses from the string and "nudge" the block. Eventually you will find a mass that, once the block begins to move, will pull the block at a constant speed. When this happens, the tension in the string is equal to the force of kinetic friction.

Equations:

Newton's Second Law

Vertically: N = (m of block) g
Horizontally: T = (coefficient of friction) (N)

T is equal to (m of hanging weights)(g) and N was found in the first equation.