The body, moving rectilinearly at an angle a1=60° to the OX axis in the XOY plane, passed a path segment S1=40 m. Then, moving rectilinearly at an angle a2=120 to the same axis, passed S2=80 m. Total time of movement t= 4 s. Determine the average speed module |< v >| and average velocity module |< v >| bodies.
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