In this investigation, you will determine the coefficients of static and kinetic friction. Coefficients of friction are a measure of the amount of friction existing between two surfaces.

The coefficient of static friction, ss, is the measure of the amount of friction between two surfaces that are at rest.

The coefficient of kinetic friction, ss, is the measure of the amount of friction between two surfaces that are moving.

By the end of this lab activity, you will be able to answer the question, "What is the relationship between the coefficients of static and kinetic friction?" using data to support your answer.

For this investigation, you will use the friction mode of the PhET simulation "Forces and Motion-Basics," which appears below. Using this simulation, you will find the force of friction. Then, you will calculate the coefficients of static and kinetic friction using the formula. Finally, determine how the two coefficients compare to each other.

Once you have completed the experiment, you will communicate the results by writing a laboratory report in a word- processing program.

Dashboard | Color x Physics A (FA22) A Coefficient of Fric x Mod4 Coefficient X Coefficient of Fric x Untitled documen X Physics module 4 | C s3.amazonaws.com/content.accelerate-ed.com/Secondary/docs/PhysicsA/Mod4_CoefficientofFriction OnlineLab_Instructions.pdf Mod4_CoefficientofFriction OnlineLab_Instructions.pdf 1/3 100% + PHYSICS Physics Lab Instructions Read and follow the steps to complete the investigation. Coefficient of Friction Online Lab * Upload Document | + M 1 2 Laboratory Instructions Click the "Friction" mode of the simulation. On the screen, you will see a crate and a figure that can apply force to the crate. The controller for the "Applied Force" is located below the track. The applied force is set to 0 newtons. To make the figure apply a force to the crate, use the arrows on the right side of the force reading. The double arrows add 50 N at a time, and the single arrow adds 1 N at a time. The section toward the top right side of the simulation window has various labelled areas. If "Values" is checked, the values for the forces and masses will be shown. If "Masses" is checked, the mass of each object will be shown; and if "Speed" is checked, the relative speed of the object will be shown. Applied Force O newtons -500 500 Forces Sum of Forces Values Masses Speed 3 Friction There is also a slider to vary the friction with a default of medium friction. "Forces" should already be selected. For this activity select "Sum of Forces," "Values," "Masses," and keep the friction slider at the default value of medium friction. None Lots Make two data tables for recording information. Make one data table for the coefficient of static friction and one for the coefficient of kinetic friction. On each of these data tables, have places to record the mass, normal force, friction force, and coefficient of friction for four trials. Follow these instructions to calculate the coefficient of static friction using the simulation.