Engineering Statics

B-2


  Given the vectors P = -2i + 3j + 4k and S = i + 3j + 5k, compute the scalar product for P and S.

To obtain the scalar (dot) product, multiply the x component of 
the first vector with the x-component of the second vector.  Do 
the same for the y and z components.  Since the scalar product 
of i and i, j and j and k and k is 1, the three multiplications 
yield scalars.
Adding the three scalars given the answer of -10. 
Notice that the answer is a SCALAR.