p04 068

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68. The initial position vector 

r

o

satisfies 

r

− r

o

= ∆

r, which results in



r

o

= 

r

r = (3ˆj4 ˆk) (2ˆi3ˆj+ 6 ˆk) = 2.0ˆi+ 6.0ˆj10 ˆk

where the understood unit is meters.


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