Register to reply

Component vector method for resultant force

by argentnox
Tags: component, force, method, resultant, vector
Share this thread:
Mar24-11, 05:39 PM
P: 2
1. The problem statement, all variables and given/known data

An object has two ropes attached. One is on the x axis (positive) with a 60 lb force. One is 120* (Quadrant II) from the first rope with a 30 lb force. I have to find the resultant force and angle using the component vector method of addition NOT the parallelogram method.

2. Relevant equations

Fa + Fb = R

3. The attempt at a solution

I set up a table of components, but I am not sure if they are correct. I am just really confused as to how to approach this problem. I know how to do it using the parallelogram method, but it seems like some important piece of information is missing for doing it using the component vector method.

A=30 lb
B= 60 lb

Angle A=120*
Angle B=0*

Ax = ??
Bx = 60 lb

Ay = ??
By = 0
Phys.Org News Partner Science news on
Experts defend operational earthquake forecasting, counter critiques
EU urged to convert TV frequencies to mobile broadband
Sierra Nevada freshwater runoff could drop 26 percent by 2100
Mar25-11, 06:06 AM
Sci Advisor
HW Helper
tiny-tim's Avatar
P: 26,148
hi argentnox! welcome to pf!

(try using the X2 icon just above the Reply box )

to find the component in a direction, always multiply by cos of the angle to that direction
Mar25-11, 12:49 PM
P: 2
Thank you, I will try that and see how I do. If it is okay, I will probably come back to make sure I got the correct answer. I figure if I got the answer correct, I must have done the work correctly. ;)

Register to reply

Related Discussions
Resultant component of adding Three simple harmonic motions together help...Diagram! Introductory Physics Homework 3
Vector addition analytical & component method Introductory Physics Homework 2
Finding resultant force/vector help? Introductory Physics Homework 1
Help with adding vectors with component method (sin/cos/tan) Introductory Physics Homework 3
Vector addition problem - component method Introductory Physics Homework 15