Posted by al on .
A constant force 6i2j1k moves an object along a straight line from point (8, 6, 9) to point (5, 3, 3).
how do you find the work done

math 
drwls,
Take the scalar "dot" product of the force vector and the displacement vector. The displacement vector is
13i +9j +12k
(13)*(6) + 9*(2) + 12*(1)
= ?