Lab 4_ Newton’s Laws

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School

Louisiana State University *

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Course

2108

Subject

Mechanical Engineering

Date

Jan 9, 2024

Type

docx

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1

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Lab 4: Newton’s Laws Purpose: The purpose of this lab is to observe how forces act upon one another by the use of a pulley.Using the program called LoggerPro and Graphical Analysis, we will gain knowledge of how to use the program and utilize it to create graphs demonstrating the force, mass, and acceleration of an object. Procedure: Before beginning the lab, the first thing we checked is that the cart track is level by using the angle cube. Once the track is level, the photgate needs to be positioned at the correct height for the photodetector to work when being utilized. The force sensors were then set to +/- 10 N, we placed the thread over the pulley and hung the mass hanger loop to the end of the thread. Next, LoggerPro was manipulated to change the sensor range and create three graphs for Force, Velocity, and Acceleration. One lab partner pulled back the cart to the end of the track while another lab partner pressed the “collect” button. Once ready, the cart was released to collect the data on the graphs. This was repeated multiple times after adding 10g respectively to th e mass hanger. The graphs are attached and data was recorded in both data tables. Reflection: 1. No, the theoretical mass from the balance did not fall within the error bars. This portrays the understanding that there was too much error to be close enough. 2. Yes, there may be a systemic problem in the way that the cart was being released and held that may cause the invisible forces acting on it. Even though we are saying the pulleys are frictionless and massless for the experiment’s sake, there is still some friction and mass acting on the string from the pulleys so this can also account for an unseen force. 3. The reason that the force plot drops near two seconds is because there is no force that is acting on the car so the force approaches zero. Application: In the packet Data Tables: In the packet Conclusion: In this lab, we observed and tested how unbalanced forces act upon each other through Newton’s Laws. With the use of LoggerPro and Graphical Analysis, we were able to collect data and graph it as well as calculate standard deviation, mass, and percent error. Concepts from Newton’s Laws of Motion were used to draw free body diagrams and to relate the horizontal mass and the hanging mass. The knowledge of Newton’s Laws of Motion equations were used to calculate data such as tension, normal force, and acceleration.
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