Instructions: For this lab you will be using a simulation provided by Phet. Choose the Intro simulation. You will be playing around and answering the inquiry-based questions. Go to: https://phet.colorado.edu/en/simulation/forces-and-motion-basics Sum of Forces _ Values Sim #1: Go to Net Force [Check off Each of the Boxes] Speed For each scenario write down your hypothesis of how the cart will move. Net Force Write about the direction it will move, whether the cart's speed will increase, decrease, stay the same, or be 0, and who you think will win. Then, play the simulation and write a conclusion based on the simulation. 1. Put one of the small blue guys on the rope. Then press GO. (2 pts) Hypothesis: Conclusion: 2. Put one of the small blue guys on the rope and then put one of the small red guys on the rope. Press GO. (2 pts) Hypothesis: Conclusion: 3. Put one of the small blue guys on the rope and then put one of the medium red guys on the rope. Press GO. (2 pts) Hypothesis: Conclusion: 4. Put one of the small blue guys on the rope then press GO. After about one second, put one small red guy on the rope while the cart is in motion. (3 pts) Hypothesis: Conclusion:Sim #2: Go to Motion Simulation [Check off Each of the Boxes] Force Values For each scenario write down your hypothesis of how the objects will move. Masses Write about the direction it will move and whether the speed will increase, Speed decrease, stay the same, or be 0. Then, play the simulation and write your conclusion based on the simulation. Motion 1. Apply a constant force of 50 N directed to the right of the 50 kg Box. (2 pts) Hypothesis: Conclusion: 2. If you apply a constant force of 50N, calculate how long it will take to move the 50kg box so that it is moving with a speed of 30 m/s. After you calculate your results, test it out with a stopwatch. (3 pts) 3. Apply a constant force of 50 N to the right for about 5 seconds before reducing the applied force to zero (the mannequin should stop pushing). Describe the motion of the box both when the person is pushing on it and after the person lets go. (3 pts) Hypothesis: Applied Force 50N 50 kg 50 kg Conclusion: 4. Apply a constant force of 50N to the left for about 7 seconds, then immediately apply a force of 50N to the right. (3 pts) Hypothesis: Applied Force 50N Applied Force 50N 50 kq 50 kg O3. Apply a constant force of 50 N to the right for about 5 seconds before reducing the applied force to zero (the mannequin should stop pushing}. Describe the motion of the box both when the person is pushing on it and after the person lets go. (3 pts) Hypothesis: Conclusion: 4. Apply a constant force of SON to the left for about 7 seconds, then immediately apply a force of SON to the right. (3 pts) Hypothesis: Conclusion: 5. In the simulation, if you wanted an object to have the greatest/least amount of acceleration, what combination of Object and Force would you use? (3 pts) Force | Obiect Highest Acceleration: | Lowest Acceleration: | 6. Calculate how much mass the mystery box has, use a stopwatch to help you find the results. (3 pts) Sim #3: Go to Friction [Check off Each of the Boxes and set the Friction Level to "Lots"] Forces Sum of Forces For each scenario write down your hypothesis of how the objects will move. Write about _ Values Masses the direction it will move and whether the speed will increase, decrease, stay the Speed Friction same, or be 0. Then, play the simulation and write your conclusion based on the None Lots Friction simulation. 1. Apply a constant force of 50 N directed to the right of the 50 kg Box. (2 pts) Hypothesis: Conclusion:/ 2. Find the minimum force necessary to get the box to start moving. (2 pts) A. Once you found the minimum force needed to get the box to start moving, what is the minimum force you need to keep the box in motion without it slowing down? (2 pts) B. What does this say about the frictional force needed when you want to get something to move compared to when it is already moving? (2 pts) C. When you apply this minimum force on the box from Part A, what is the motion of the box? (2 pts) D. While the box is still in motion, what will happen to the box if you start to push on the box with less than the minimum force you found for Part A? (3 pts) Hypothesis: Conclusion:Hypothesis. Conclusion: 3. Rest the scenario and add the little girl on top of the box. Do you think that the force of friction will increase, decrease, or stay the same? (3 pts) Hypothesis: Conclusion: Friction Force| Applied Force