physics help pleasee

Test Preparation SAT Subject Test Preparation
1

<p>can somebody help me answer these questions and show what you did to solve the problems...</p>

<p>1) Boy A is pulling on a rope eastward at 40 newtons of force and Boy B joins him pulling eastward at 60 newtons. What is the resultant force?</p>

<p>2) Girl A is pulling eastward at 40 lb while Girl B is pulling westward at 60 lb. The resultant or net force would be?</p>

<p>3) Boy A is pulling eastward at 40 N of force while Girl B pulls southward with a force of 30 N. What is the net force (give both magnitude and direction)?</p>

<p>thanks!</p>

2

<p>1) (40 + 60) = 100 N eastward
2) Treating east as positive, (40 + -60) = -20, or 20 N westward
3) If you draw a triangle, you have a horizontal component 40N east and 30N south, so the magnitude of the force would be 50N, (it’s like a 3-4-5 triangle). I’m not sure how you would write the direction, maybe as a vector <40East, 30South>?</p>