Do you know how to write vectors and add vectors?
An object is acted upon by 3 coplanar forces.
One force is 100 pounds due south,
another is 150 pounds due east
and the third is 200 pounds 30° north of east.
What is the force needed to prevent from moving?
P * 30°
o - - - - - - * v
We have: .
The resultant vector is: .
is moving directly east with a force of pounds
To prevent movement, pounds of force must be applied directly west.
. . The applied vector would be: .