1. Newton’s Laws at equilibrium By Corina Bot

2. x y 0  Given: F app = 2 N  25 ⁰ Calculate: F app, x =? F app, y =? Convert all forces into mass (in grams). Find x & y components of force F app : Problem 1

3. x y 0  Set up equipment as in figure and test that you have your system of masses in equilibrium.

4. Given: W = 200 g  60 ⁰  50 ⁰ Calculate: T 1 =? T 2 =? Keep all forces into mass (in grams). x y   x y   Problem 2

5. x y   Given: W = 200 g  60 ⁰  50 ⁰ Calculate: T 1 =? T 2 =? Keep all forces into mass (in grams). Substitute T 2 as a function of T 1 from equation (3) in equation (4) and calculate T 2. Return to equation (3), substitute your found value of T 2 and calculate T 1.

6. x y   Set up equipment as in figure and test that you have your system of masses in equilibrium.

7. Sir Isaac Newton's own first edition copy of his Philosophiae Naturalis Principia Mathematica with his handwritten corrections for the second edition. http://upload.wikimedia.org/wikipedia/commons/4/41/NewtonsPrincipia.jpg