Answer My Questions on Calculating Angles from a Picture

[hpla]

hey . this is a simple Questions , look at pic this is a statics


[PLAIN]http://hh7.net/Sep/hh7.net_13195790041.png [Broken]


my Question . how he calculate 120 , 290 for Angles ??

 

[SteamKing]

Your diagram doesn't match the table.

 

[gsal]

I don't quite understand what's being asked.

 

[W R-P]

The angles show the direction each force is acting,ANTICLOCKWISE relative to the positive x-axis ---->
150 N acts at 120 degrees, starting from ---> go anticlockwise 90 degrees,then add 30 degrees = 120 degrees
50 N acts at 250 degrees,not 290 go 180 degrees anticlockwise then add 70 degrees.

P.S THE UNITS ARE ALL WRONG, they should be N not Nm