Answer to Question #96501 in Analytic Geometry for Olajide Olaitan

Analytic Geometry

Question #96501

Find the work done in moving an object along a vector r=3i+2j-5k, if the applied force is F=2i-j-k

Expert's answer

The work is equivalent to the dot product of the two vectors:

"W=rF=(3i+2j-5k)(2i-j-k)=\\\\=3*2+2*(-1)+(-5)*(-1)=9."

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