a wooding block of mass 7.6kg rest on a rough horizontal surface if the surface is 8N calculate the coefficient of friction

Wb = m*g = 7.6kg * 9.8N/kg = 74.48 N. =

Wt. of block.

Fs = 8 N ?

Fs = us*Fv = 8 N.
us*74.48 = 6
us = 0.081

To calculate the coefficient of friction between the wooden block and the rough surface, you need to use the formula:

Coefficient of friction (μ) = Force of friction (Ff) / Normal force (N)

First, let's calculate the normal force (N), which is the force exerted by the surface on the block.

Normal force (N) = Mass (m) x Gravity (g)

Given that the mass of the wooden block is 7.6 kg and the acceleration due to gravity (g) is approximately 9.8 m/s², we can calculate the normal force:

N = 7.6 kg x 9.8 m/s²
N ≈ 74.48 N

Now, we can calculate the force of friction (Ff) acting on the wooden block, which is given as 8 N.

Ff = 8 N

Finally, we can substitute the values into the formula to find the coefficient of friction:

μ = Ff / N
μ = 8 N / 74.48 N
μ ≈ 0.107

Therefore, the coefficient of friction between the wooden block and the rough surface is approximately 0.107.