Featured in PASCO’s Advanced Physics Teacher Guide

Advanced Physics Teacher Guide

(PS-2879C)

This manual features over 30 College Board curriculum and AP Physics exam inspired lab activities.

Coefficients of Friction

Lab Summary

Use a force sensor and a motion sensor to determine the coefficients of friction between an object pulled across a surface and the surface itself.

Theory

Students determine the coefficients of friction between an object pulled across a surface and the surface itself.

  • Establish an understanding of the difference between kinetic and static friction.
  • Devise a graphical method to experimentally determine each coefficient value.

Method

Students gain experience conducting the following procedures:

  • Calculating the normal force of a friction tray with various masses.
  • Using a force sensor to graph the force versus time as a friction tray is pulled from rest to a constant velocity.
  • Determining the maximum static frictional force and the kinetic frictional force by observing the characteristic shape of the force-time graph.
  • Graphing the maximum static frictional force versus the normal force, and the kinetic frictional force versus the normal force to determine the coefficients of static friction and kinetic friction.

Sensors / Equipment Used:

PASPORT Motion Sensor

(PS-2103A)

The PASPORT Motion Sensor accurately measures position, velocity, and acceleration of a target. Can be used to track the motion of carts, balls, people and more.

PASPORT Force Sensor

(PS-2104)

Designed to measure both pulling and pushing forces. Uses range from collisions to tug-of-war.

Discover Friction Accessory

(ME-8574)

Four plastic trays with unique surfaces (cork, felt, and 2 plastic) to use with dynamics carts and sensors.

Materials Used:

250 g or 500 g Masses - 4
Balance, 1200-g capacity 
String - 20 cm

The Associated Bundle:

Advanced Physics Standard Sensor Bundle

(PS-2932B)

This bundle contains the probeware needed to perform all 37 lab activities in the Advanced Physics lab manual.

Interface Required

This experiment may require software and an interface for data collection.