Homework Help: Four forces are acting simultaneously on a sack: vectors

1. Oct 16, 2011

VICKZZA

1. The problem statement, all variables and given/known data

Four forces are acting simultaneously on a sack,Their magnitude are given as 200N.150N,175N,250N.THE ANGLE B/W 200N AND 150N IS 64DEGREE, AND B/W 150N AND 175N IS 59DEGREE AND B/W 175N AND 250N IS 74DEGREE.FIND THE RESULTANT FORCE ACTING ON THE SACK?

i need immediate assistance with explanation...

2. Relevant equations

3. The attempt at a solution

Last edited by a moderator: Oct 16, 2011
2. Oct 16, 2011

Staff: Mentor

Re: vectors

Start by drawing a diagram showing the forces and the angles between them. I would arbitrarily put the first force pointing in the x-direction.

3. Oct 16, 2011

lewando

Re: vectors

Are the forces pushing or pulling on the sack?

4. Oct 16, 2011

VICKZZA

Re: vectors

pulling

5. Oct 16, 2011

VICKZZA

Re: vectors

i am telling u a complete link about this question, its is from A level mechanics and the chapter is vector and its in the examples next to exercise 3a...page is 57.. plz give me a detailed explanation

6. Oct 16, 2011

Staff: Mentor

Re: vectors

OK, so they give you the diagram. You can do as the book suggests, and add the vectors graphically. They give you that solution. Or you can use the method of components (that's what I would do).

Call the 200 N force to point in the x-direction. Now find the components of each force. Just add them up to find the resultant.

7. Oct 16, 2011

VICKZZA

Re: vectors

ok dear

8. Oct 16, 2011

VICKZZA

Re: vectors

still not getting the answer u plz resolve it urself and find the resultant force