- #1

IHave

- 21

- 0

## Homework Statement

a force is given by F= 20i - 60j + 90k N. Find its magnitude and the angles it forms with the coordinate axis.

## Homework Equations

F = magnitude of F times the unit vector

magnitude is square root (Fx squared + Fy squared + Fz squared)

and the unit vector can be written as (cos(theta)x)i + (cos(theta)y)j + (cos(theta)z)k

x for x component

y for y component

z for z component

to find the angle of the x component: inverse cosine of Fx/magnitude

## The Attempt at a Solution

For the magnitude I got 110

for the angles with respect to x, y, z: 79.5, 123.1, 35.1

please tell me if i did something wrong! thanks