A wheel with a radius of 45.0 cm rolls without slipping along a horizontal floor (Figure). At

Question:

A wheel with a radius of 45.0 cm rolls without slipping along a horizontal floor (Figure). At time t1, the dot P painted on the rim of the wheel is at the point of contact between the wheel and the floor. At a later time t2, the wheel has rolled through one-half of a revolution. What are?

(a) The magnitude and

(b) The angle (relative to the floor) of the displacement of P?