Find two vectors in opposite directions that are orthogonal to two vector u. (Th

Question

Find two vectors in opposite directions that are orthogonal to two vector u. (There are many correct answers.) u = 1/4 i - 4/3 j positive x-component, positive y-component negative x-component negative y-component One of the events in a strength competition is to pull a cement block 100 feet- One competitor pulls the block by exerting a force of 235 pounds on a rope attached to the block at an angle of 30 degree with the horizontal (see figure). Find the work done in pulling the block. () ft-lb Use the vectors u = (2. 5) and v = (-7, 7) to find the Indicated quantity. 3u middot v 3u middot v =

Explanation / Answer

v=1/4i -4/5j

In case of orthogonal,the vectors dot product is zero

Therefore the first vector is 4/5i +1/4j

and the other vector is -4/5i-1/4j

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