(a) In Figure 15.2e, the cart's displacement from the equilibrium position is maximum. Is the \(x\) component of the cart's acceleration at that instant positive, negative, or zero?

(b) At which instant(s) in Figure 15.2 is the magnitude of the cart's acceleration greatest? At which instant(s) is it smallest? (Use the blue position curve to answer these questions.)

Transcribed Image Text:

Figure 15.2 Periodic motion is the result of a continuous exchange between kinetic and potential energy. (a) t=0 (b) 0.09 s (c) 0.18 s (d) 0.27 s (e) 0.36 s x=0 K U E K U K U K U K U