C: Finding Resultant Forces at an Angle

[coolone_888]

Forces of 67.2lb and 57.3lb are exerted at an angle of 47 degrees. What is their resultant?

 

[Andrew Mason]

Forces of 67.2lb and 57.3lb are exerted at an angle of 47 degrees. What is their resultant?

Show us what you have done first. How do you add these forces?

AM

 

[coolone_888]

well i know you use c2=a2+b2-2ab cos C. but then I am not sure what to do next.

 

[Andrew Mason]

well i know you use c2=a2+b2-2ab cos C. but then I am not sure what to do next.

Draw a vector diagram. Place one vector along the x axis. The other 47 degrees from the axis with its tail on the head of the first. Draw the resultant. What is the component of the second vector in the y direction? What is its component in the x direction? Add the x components to get the x component of the resultant. What is the y component of the resultant?

AM