Question

1. Find the displacement vector of a particle starting at (3,4,8) and moving towards (- 2,4,1).

Answer 1

Answer:

$-5i - 7k$

Explanation:

Initial position of the particle Pi  = (3,4.8); which can also be written as $3i+4j+8k$

Final position of the particle Pf = (-2, 4, 1 ); i.e. $-2i+4j+1k$

displacement = Final position - initial position

= pf - pi

$(-2i+ 4j + k ) - (3i + 4j + 8k)\\\\(-2-3)i + (4-4)j + (1-8)k\\-5i - 7k$