Continuation of Problem 67 let reference frame C in Figure move past reference frame D (not shown).

(a) Show that MAD = MABMBCMCD,

(b) Now put this general result to work: Three particles move parallel to a single axis on which an observer is stationed. Let plus and minus signs indicate the directions of motion along that axis. Particle A moves past particle B at β AB = +0.20. Particle B moves past particle C at β BC = -0.40. Particle C moves past observer D at β BC = +0.60.What is the velocity of particle A relative to observer D? (The solution technique here is much faster than using Eq. 37 -29.)

B *. . ' -x x