Engineering Statics


  Given the vectors Q = -i + 4j - 6k and S = i + 3j + 5k, compute the scalar product for Q and S.

To obtain the 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.