4. Two points, A and B, located along the radius of a wheel, as shown, have
speeds of 80 and 140 m/s, respectively. The distance between the points is RBA = 300 mm.
a) What is the diameter of the wheel? (answer: 1.4m)
b) Find VAB, VBA, and the angular velocity of the wheel. (60j m/s; -60j m/s; 200 rad/s cw)
W2 2 0₂ B