Consider a wheel of radius R2, illustrated in Figure
Consider a wheel of radius R2, illustrated in Figure 9.32. String is wrapped around a concentric spool of radius R1, making an angle of α with the horizon
tal. When tension T is applied to the string, the wheel rolls without slipping in a direction (left or right) determined by the angle α. Find the critical angle α∗ above which the wheel rolls to the left and below which it rolls to the right.