Answer:
Explanation:
Consider the force due to friction:
where;
N = normal reaction
= coefficient of kinetic friction.
Via the horizontal direction, the forces of equilibrium are:
where;
= angle of AB is associated with the horizontal;
= force exerted by AB
Let's take a look at the equilibrium of forces along the vertical direction.
By dividing (3) by (2), we get:
By replacing the obtained value of N into:
we have:
Moment about center A can be expressed as:
where;
= angular acceleration of the disc
I = mass moment of inertia
r = radius of disc
By replacing F and I; ∝ becomes:
where;
g = 9.8 m/s²
r = 0.18 m
θ = 60°