# Question: consider the forces measured in newton n f1 10i...

###### Question details

Consider the forces (measured in Newton, N): F1 = (10i - 15j - 8k), F2 = (-5i - 6j + 9k) and F3 = (-12i + 4j + 20k). (a) Determine the unit vectors along each of forces, F1, F2 and F3. (b) Determine the direction cosines of F1, F2 and F3. (c) Using the determinant representation, compute F1 ×F2, F2 ×F3 and F3 ×F1. (d) Determine the angle between F1 and F2, the angle between F2 and F3, and the angle between F3 and F1.