Physics for Life Scientists Lab Report-HCC .
Name: Group Members: Date: Physics 130 Physics for Life Scientists Newton’s Laws and the Lunar Landing _______________________________________________________________________________ Introduction: In this simulation, you will experience Newton’s Laws from the standpoint of operating a spacecraft in a frictionless environment. You will learn how to pilot a lunar Lander, also called a Lunar Excursion Module or Lunar Module (LEM, LM) and land that craft on the surface of the moon. However, just like Neil Armstrong in 1969, you will have a limited amount of fuel and time before you will have to find a safe place to land the LM or suffer the consequences. Objectives: ● To gain an understanding of objects in motion in a straight line will only change their path if a force is applied according to Newton’s 1st Law ● To understand the relationship between force, mass, and acceleration according to Newton’s 2nd Law. ● To learn the concepts of action/reaction forces according to Newton’s 3rd Law. ● To apply the kinemativ equations to new situations. Procedure: Familiarize yourself with the controls of the LM. Take a few minutes and play around with the Lander to see how it operates. If you can land your craft in between tighter boulders, you can get a higher score. Try flying horizontally and see what happens. Try boosting the LM at full thrust vertically upward and see what happens. Turn on the vector display so that you will visualize the factors acting on your Lander. Note that you can pause the program at any time to collect data! 1 Newton’s Laws: 1. While your LM is above the surface of the moon, fire the engines to gain some altitude. Cut your thrust so that you don’t waste all of your fuel. You should be at least 250m above the surface. Once you get to this altitude, tilt the LM so that you are at a 450 to the vertical. Fire your engines for a brief burst. a. Once you fire your engines what do you notice about the x-Velocity? b. How can you correct your trajectory to compensate for the effect you observed in part (a)? c. Explain the reason why you have to correct your trajectory using Newton’s Laws. d. What do you have to do in order to get the LM to hover at a constant altitude? Adapted from Vernier, Physics 131, Scott Stambach, Cuyamaca College 2. Reset the simulation so that your LM has a full tank of fuel. Fire your engines for a short burst so that you gain some altitude. You should be at least 300m from the surface. a. Record an initial altitude for the LM and let it fall toward the surface without firing its engine. Notice the y-Velocity on the display monitor. Use this information to calculate the acceleration due to the moon’s gravity. Record your solution with the data you collected below. b. Once you have calculated the moon’s acceleration due to gravity, find the maximum acceleration of the LM due to its engines. Explain your solution below and show the data you used and collected. Adapted from Vernier, Physics 131, Scott Stambach, Cuyamaca College c. Now with the data you collected and your answer to part (b), find the mass of the LM. Explain your solution below and show the data you used and collected. d. Does your value for the mass of the LM change depending on how much fuel you use up in the simulation? Support your answer with data and show your work. e. According to your findings from this simulation, what would the LM’s weight be on Earth? On the Moon? Adapted from Vernier, Physics 131, Scott Stambach, Cuyamaca College Part 2 – Projectile Motion 1. Use the value for the acceleration due to gravity on the moon to complete this extension. Boost the LM to an altitude of ~300 m such that the y-Velocity will be zero at this point. (You may have to pause the simulation to get the sequence down.) Have the LM tilted 900 to the left or to the right so that if you fired the engines the resulting velocity would be along the x-axis. 2. Once at this altitude, and with the LM in the proper position, fire the engines for a short burst so that the LM gains a velocity of ~0.5 m/s (make sure you write down the exact velocity). 3. Predict where the LM will crash if you let it continue on its path to the surface of the moon. Does your prediction match the readout for the LM’s range on the display panel? (Note, you may have to maneuver your LM so that you have an initial x-position = 0m. Do this before you set the LM in position at the 300 m altitude. If this is too difficult, just note your initial x-position.) Find the % error between your prediction and the actual range. Adapted from Vernier, Physics 131, Scott Stambach, Cuyamaca College S SOLUTION: physics questions – х Week 6 Homework – Forces 6 NWP Assessment Player Ul Applix + 1 C A https://assessment.education.wiley.com/was/ui/v2/assessment-player/index.html?launchid=8e1e8333-4906-4eee-b9c0-844d0e185144#/question/14 1 Week 6 Homework-Forces Question 3 Multiple Choice Correct Question 15 of 15 < 071 III Question 4 Multiple Choice 1/1 Correct Incorrect. Question 5 Numeric Fill in the Blank with Units 1/1 Correct A 8.94 x 104 kg lunar landing craft is about to touch down on the surface of the moon, where the acceleration due to gravity is 1.60 m/s2. At an altitude of 265 m the craft’s downward velocity is 22.1 m/s. To slow down the craft, a retrorocket is firing to provide an upward thrust. Assuming the descent is vertical, find the magnitude of the thrust needed to reduce the velocity to zero at the instant when the craft touches the lunar surface. 1/1 Question 6 Multiple Choice Correct Question 7 Multiple Choice 1/1 ✓ Correct Question 8 Numeric Fill in the Blank with Units 0.1/1 Partially correct Question 9 Multiple Choice 1/1 Correct vo Question 10 Multiple Choice 1/1 Correct Question 11 Numeric Fill in the Blank with Units 1/1 Correct 1/1 Question 12 Numeric Fill in the Blank with Units Correct Number i 2.254.1045 ! Units N 1/1 Question 13 Numeric Fill in the Blank with Units Correct e Textbook and Media Question 14 Numeric Fill in the Blank with Units 1/1 Correct Hint Save for Later Attempts: 1 of 10 used Submit Answer Viewing Question 15 Numeric Fill in the Blank with Units 071 X Incorrect о Type here to search IH . GB el 4) ENG 6:40 PM 9/24/2020 S SOLUTION: physics questions – х Week 6 Homework – Forces 6 NWP Assessment Player Ul Applix + 1 C A https://assessment.education.wiley.com/was/ui/v2/assessment-player/index.html?launchid=8e1e8333-4906-4eee-b9c0-844d0e185144#/question/7 1 Week 6 Homework – Forces Question 3 Multiple Choice Correct Question 8 of 15 < > 0.1/1 III View Policies Question 4 Multiple Choice 1/1 ✓ Correct Show Attempt History Current Attempt in Progress Question 5 Numeric Fill in the Blank with Units 1/1 Correct Your answer is partially correct. Question 6 Multiple Choice 1/1 Correct A supertanker with the mass of 6.71 108 kg is moving with a constant velocity. Its engines generate a forward thrust of 1.13 x 106 N. Determine (a) the magnitude of the resistive force exerted on the tanker by the water and (b) the magnitude of the upward buoyant force exerted on the tanker by the water. Question 7 Multiple Choice 1/1 Correct Viewing Question 8 Numeric Fill in the Blank with Units 0.1/1 Partially correct Question 9 Multiple Choice 1/1 Correct Question 10 Multiple Choice 1/1 Correct (a) Number i 1.13*10^6 ! Units N (b) Number i 6.58.10^9 ! Units N Question 11 Numeric Fill in the Blank with Units 1/1 Correct e Textbook and Media Question 12 Numeric Fill in the Blank with Units 1/1 Correct Hint Question 13 Numeric Fill in the Blank with Units 1/1 Correct Save for Later Attempts: 2 of 10 used Submit Answer Question 14 Numeric Fill in the Blank with Units 1/1 Correct Question 15 Numeric Fill in the Blank with Units 0/1 Unsubmitted work j IH Type here to search > A el Ta » ENG 6:40 PM 9/24/2020 留 1 Week 7 SIX Assignme x Hess_Law X PDF Heat_Reac x Grand Roux : OWLv2 X C A Centrifu х y! a radius o S SOLUTION X DE lab77.pdf PO 20200923 X C Energy Is x 8 Beyond La x Log InCX + C File C:/Users/alyaa/OneDrive/Documents/lab77.pdf it 5 of 5 + FA) Read aloud Draw Erase 요 C TE Part 2 – Projectile Motion 1. Use the value for the acceleration due to gravity on the moon to complete this extension. Boost the LM to an altitude of -300 m such that the y-Velocity will be zero at this point. (You may have to pause the simulation to get the sequence down.) Have the LM tilted 90° to the left or to the right so that if you fired the engines the resulting velocity would be along the x-axis. 2. Once at this altitude, and with the LM in the proper position, fire the engines for a short burst so that the LM gains a velocity of -0.5 m/s (make sure you write down the exact velocity). m V= 0.48 m/s s 3. Predict where the LM will crash if you let it continue on its path to the surface of the moon. Does your prediction match the readout for the LM’s range on the display panel? (Note, you may have to maneuver your LM so that you have an initial x-position = Om. Do this before you set the LM in position at the 300 m altitude. If this is too difficult, just note your initial x-position.) Find the % error between your prediction and the actual range. 310 = X2 Horizontal velocity = 848/s Altitude = 300m a time of flight = 1.6 – 19.3649 seconds Horizontal distance travelled before crash = 19.3649 X0:48 = 19.295 m Actual = 9.27 m 9.295-9.27. Percentage 9.27 X100 =0:27.1. range = erw= Adapted from Vernier, Physics 131, Scott Stambach, Cuyamaca College o Type here to search IH D . O a » ENG 1:32 PM 10/1/2020 6
