What physical properties of nylon and leather make them good materials to use for shoelaces? a. high density and low conductivity b. durability and flexibility c. hardness and durability d. low viscosity and flexibility

The 5-kg cylinder is initially at rest when it is placed in contact with the wall b and the rotor at a. if the rotor always maintains a constant clockwise angular velocity v = 6 rad> s, determine the initial angular acceleration of the cylinder. the coefficient of kinetic friction at the contacting surfaces b and c is mk = 0.2.