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Answer to Question #46933 in Other Math for prromise ayansola

Question #46933
Find the work down in moving an object along a vector r = 3i + 2j - 5k,if the applied force is F = 2i-5 -k

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Expert's answer
The work down in moving an object along a vector r, if the applied force F, is given by the dot product
A=Fr=(2i-5j-k)(3i+2j-5k)=2*3+(-5)*2+(-1)*(-5)=6-10+5=1.

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