Find the work done in moving an object along a vector r=3i+2j-5k, if the applied force is F=2i-j-k
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4
9 ..................
egbadonehimen:
Am so happy it was correct
r u making fun?
I don't understand
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Find the work done in moving an object along a vector r=3i+2j-5k, if the applied force is F=2i-j-k
A=Fr=(3i-2j-5k)(2i+j-k)
=3*2+(-2)*1+(-5)*(-1)
=6-2+5
=9
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