An expectant father paces back and forth, producing the position-versus-time graph shown in Figure 225. Without performing a calculation, indicate whether the fathers velocity is positive, negative, or zero on each of the following segments of the graph: (a)A, (b) B, (c) C, and (d) D. Calculate the numerical value of the fathers velocity for the segments (e)A,(f)B,(g)C, and (h)D, and show that your results verify your answers to parts (a)(d).

*Centrifugal Force only present in noninertial reference frames* *Kinetic Friction implies “sliding” not rolling or walking, these involve static friction v 2 EQUATION μ s rg *only or pecific situations hen the static frict he centripetal acceleration* Circular Motion Problems Draw f ree body diagram What f orce is point oward the center F a v2 = ω r net c r Nonuniform Circular M otion Changing tangential velocity dω Angular acceleration α = dt Tangential cceleration at= rα v = rω