Let the the object move from P(2, 1, 3) to Q(9, 4, 6) Here, the position vectors, pβ=2i +1j+3kand qβ=9i +4j+6kHence, PQβ = qβ β pβ =(9i +4j+6k)β(2i +1j+3k)=7i +3j+3k F =2i β1jβ3k β΄ Work done = F . PQβ =(2i β1jβ3k ).(7i +3j+3k)=14β3β9=2 meters
Comments
Leave a comment