Physical Science I - PHYS 1415 Lab 2 - Newton's Third Law of Motion Purpose To develop an understanding of Newton's Third Law of Motion through the use of a computer simulation demonstrating the relationship between acting and reacting forces. Discussion Newton's Third Law helps us understand the relationship between an acting force and the resulting force. For instance, when walking, one foot pushes off the ground, while at the same time, the ground pushes back up on the foot, with an equal and opposite force. Procedure SETUP Open the simulation: https://phet.colorado.edu/sims/html/forces-and-motion-basics/latest/forces-and-motion- basics en.html PART A: Net Force Once the simulation opens, select the first option, Net Force and open it. Step 1: Working with forces a. In the menu box on the top right, check the box for "Sum of Forces" and "Values." Keep all other default settings as they are. The sum of forces vector is the acceleration of the system. You will note there are three varying sizes of people on either size in blue and red; we will refer to them as person Blue/Red A (tallest), person Blue/Red B (medium height), and person Blue/Red C (shortest, there are two of these). b. Click and drag Red B and Blue A on to the rope. Observe and describe what happens to the sum of the forces vector, the force values and to the wagon. (You can move the wagon back to the original starting position by clicking "Return" any time.) c. Describe three different ways where the sum of forces vector is: (i) positive (to the right), (ii) negative (to the left) and (iii) zero, respectively. Each arrangement should have the persons listed, force values and the sum of forces. The arrangement in part b would be: (Red B) 100 N - (Blue A) 150 N = 50 N (left) OR (Red B)100 N - (Blue A) 150 N = - 50 N) i.Physical Science I - PHYS 1415 ii. iii. Step 2: Equal and opposite forces a. Predict. Click and drag Red A and two Blue C's on to the rope. Describe what would happen to the sum of the forces vector, the force values and to the wagon. Do not play the simulation. b. Observe. Play the simulation and record what happens to the sum of the forces vector, the force values and to the wagon. Describe the arrangement equation, as you did in Step 1, part c. (You can move the wagon back to the original starting position by clicking "Return" any time.) c. Describe two different ways where the sum of forces vector is equal (or 0). Each arrangement should have the persons listed, force values and the sum of forces, as in Step 1, part c. **Note: either side may not have exactly the same combination of people as the other side and you cannot use the arrangement in part a. (The arrangement in part a would be [Red A) 150 N - (2 Blue C's) 150 N = 0) ii. d. Fill in the blank below relating Newton's Third Law to your observations in the simulations thus far. An acting force is and to a reacting force. e. Explain.Physical Science I - PHYS 1415 Use Newton's Third Law of motion to relate the relationship observed in this simulation with the forces on either side and the resultant force