A particle of mass $$\(m\)$$ rests in equilibrium on a fixed rough plane under the action of a force of magnitude $$\(X\)$$. The force acts up a line of greatest slope of the plane, as shown in Figure 3. The plane is inclined at an angle $$\(\alpha\)$$ to the horizontal, where $$\(\tan \alpha=\frac{3}{4}\)$$ The coefficient of friction between the particle and the plane is $$\(\mu\)$$. - When $$\(X=2 P\)$$, the particle is on the point of sliding up the plane. - When $$\(X=P\)$$, the particle is on the point of sliding down the plane. Find the value of $$\(\mu\)$$. (8)

Answer:

Knowledge points:

Solution: