[-/8.33 Points] DETAILS SERCP11 1.3.P.002. (a) Suppose that the displacement of an object is related to time according to the expression x = Bt2. What are the dimensions of B? O L/T O T2/L O L 2 / L O L/T 2 OL X T2 O VL (b) A displacement is related to time as x = A sin(2xft), where A and fare constants. Find the dimensions of A. (Hint: A trigonometric function appearing in an equation must be dimensionless.) O T/L OL XT OT OL O L/T Need Help? Read It