what is the average velocity of a particle that moves from r i(initial) = 3.0 i

Question

what is the average velocity of a particle that moves from r i(initial) = 3.0 i - 2.0 j to r f (final) = 5.0 i + 3.0 j in2.0 seconds? convert your answer into polar form. assume thatdistance is measured in meters. whay can't you determine theaverage speed of the particle?
Please answer all questions!!! what is the average velocity of a particle that moves from r i(initial) = 3.0 i - 2.0 j to r f (final) = 5.0 i + 3.0 j in2.0 seconds? convert your answer into polar form. assume thatdistance is measured in meters. whay can't you determine theaverage speed of the particle?
Please answer all questions!!!

Explanation / Answer

Average speed V = ( rf - ri ) /t                              =(5.0 i + 3.0 j -  (3.0 i - 2.0 j) ) / 2                              = (2.0i + 5.0j ) / 2                               =1.0i + 2.5j

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