Example-2 : Resultant of coplanar concurrent forces | Engineering Mechanics

[@MaALICE-u4m]

❤ it's amazing

[@easyscienceprep7445]

Thank you

[@rajirajee8287]

Thank you for making a video on this. It seems to me that the signs of the x and y components were ignored. As a result of this, some information of the resultant vector is lost. Like in what quadrant, the resultant vector should be placed?

[@easyscienceprep7445]

Please have look at table , I have taken X-component positive towards right(i.e. positive direction of X-axis ) and vice versa, Similarly for Y-Component positive towards upward(i.e. positive direction of y-axis) and vice versa. since ΣFx and ΣFy both are positive the resultant force is in first quadrant. I will take some question where resultant will be in 2nd or 3rd quadrant, then it will be more clear. Thanks for showing interest in the video.

[@rajirajee8287]

Thank you for the clarification 👍🏻

[@sonderman8079]

I think your calculation is wrong. For the 100N the components are Fx=100cos50, Fy=-100sin50. You need to use the complement angle which is 90-40=50 degree to be correct. Your reference is always the X axis. Otherwise, Fx=100sin40, Fy=-100cos40.

[@BYRPSI]

Yes there was writing error, angle 40 is to be 50 degrees.

[@easyscienceprep7445]

There was a writing error error, Apologize for error. Please read angle between 100 N and negative y- axis as 50 degrees in the place of 40 degrees . Remaining procedure is correct. Thanks and regards.

[@sonderman8079]

@@easyscienceprep7445 Thank you

[@sonderman8079]

@@BYRPSI Thanks for the useful method. I learned so much and can now solve most of these problems.

[@bazhleigh]

Components of forces in the 4th quadrant ??? 100cos50 and 100sine50, measured from x-axis

[@easyscienceprep7445]

Yes, you are right

[@Ramesh-fj3rt]

Which book

[@easyscienceprep7445]

It is a normal question prepared, not from any book. Hope it was helpful. Thanks

[@oneboysachin1490]

This means fx and fy value is 146.17 and 65.52

[@easyscienceprep7445]

Yes.

[@Suhithareddy-h1b]

I have doubt about 4th quadrant why you taken 40 degree along x-axis

[@easyscienceprep7445]

There was a writing error, I have made a modified video for Example -2, please check in the video list.