The position of a squirrel running in a park is given by r = [(0.280 m/s)t + (0.0360 m/s2)t2]î + (0.0190 m/s3)t3ĵ. (b) At t = 5.00 s, how far is the squirrel from its initial position?

(II) Graphically determine the resultant of the following three vector displacements: 

(3) 26 m, 33° west of south.

(II) An airplane is traveling 815 km/h in a direction 41.5° west of north (Fig. 3–40). 

(b) How far north and how far west has the plane traveled after 1.75 h? 

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(I) A delivery truck travels 21 blocks north, 16 blocks east, and 26 blocks south. What is its final displacement from the origin? Assume the blocks are equal length.