M3

.docx

School

Broward College *

*We aren’t endorsed by this school

Course

2053L

Subject

Mechanical Engineering

Date

Apr 3, 2024

Type

docx

Pages

4

Uploaded by MinisterSnow24467

Name: ___Demauri Simpson_______________________________________ M3.3 Laboratory Report 5 Worksheet PhET Simulation: Friction Instructions Before you start to work on this worksheet, review the M3.3 Laboratory Report 9 Instructions Submit your completed work to the M3.3 Laboratory Report 5 dropbox. See the Schedule and Course Rubrics in the Syllabus Module for due dates and grading information. Objectives: 1. To understand one relationship between frictional force and normal force. 2. To calculate frictional force. 3. To determine the coefficients of static and kinetic friction. Pre-Lab Activities: 1. Open the simulation using the link to PhET Interactive Simulations at the University of Colorado Boulder: https://phet.colorado.edu/sims/html/forces-and-motion-basics/latest/forces-and-motion- basics_en.html 2. Explore the four options available in the simulator 3. In this laboratory investigation you will be using the Friction tab.
Part 1: KINETIC FRICTION CLICK FORCES, SUM OF FORCES, VALUES, and MASSES For each mass in the chart, push the object until it is moving fast then let go. The friction force by the red arrow will be your kinetic friction value (your first object should be 94 N) Solve for the Force of Gravity (weight) for each mass Object(s) Mass (kg) Force of Gravity (N) Fg=m(9.8 m/s 2 ) Normal Force (N) Cancels gravity in this situation so same value as Fg Kinetic Friction Force (N) 1 box 50 490 490 94 Man 80 784 784 150 Girl + 1 Box 90 882 882 169 Trash can 100 980 980 188 Man + 1 box 130 1274 1274 244 Box + trashcan 150 1470 1470 281 Man + trashcan 180 1764 1764 338 Refrigerator 200 1960 1960 x IF THE OBJECT DOES NOT MOVE EVEN WITH 500 N of force, place an X through the data as it means we cannot measure the kinetic friction (not moving) or find the static friction’s maximum value. Open the graphical analysis and plot the graph Kinetic Friction vs. Normal Force Record the m (slope) and b (y-int) value Insert the plotted graph in the lab report The slope here represents our coefficient of friction (µ) which you can think of as a measure of the stickiness between two surfaces. It is a measure of the ratio of friction and normal force. The subscript ‘k’ next to the µ indicates we are talking about kinetic friction’s coefficient, and an object that is in motion. The formula from the graph is:
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
  • Access to all documents
  • Unlimited textbook solutions
  • 24/7 expert homework help