Two forces with magnitudes of 150 and 100 pounds act on an object at angles of 30° and 120° respectively. Find the direction and magnitude of the resultant force. Round to two decimal places in all intermediate steps and in your final answer.

Question

rottenywrm · Answer

The resultant force on the object would be equal to the "dot product" of the two forces acting, which is Force(F) = 100 * 150 * cos(90) = 0. So there is not net force acting the object.

anonymous · Answer

where are you getting the cos(90) from?

anonymous · Answer

@rottenywrm

anonymous · Answer

@adrian_faz

rottenywrm · Answer

@Ziploxk "90" is the angle between the two forces. 
Resultant Force(F) = F1 * F1 * cos(Q) where Q is the smallest angle between the two forces and is also know as dot product of vectors.

anonymous · Answer

Okay but how was it found?

rottenywrm · Answer

|dw:1447813390354:dw|

anonymous · Answer

Okay can you walk me through the problem from start to finish. I have to be forgetting something.

anonymous · Answer

@adrian_faz

mathmale · Answer

Two forces are given; their directions are represented by the angles 30 and 120 degrees.  What is the difference 120-30 degrees?