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Friction Lab

Short

Definitions

Static Friction

Force that opposes impending motion.

Kinetic Friction

Force that opposes relative motion.

Equations

Helpful Guidance

Purpose

Calculate the coefficient kinetic friction.

Materials

inclined plane apparatus, mass set, mass block and motion detector

Procedure

The incline must be positioned at 30°

Use different mass relationships for all 6 trials.

Record all acceleration as positive.

Limit acceleration values to less than 1.5 m/s^2.

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Complete Set Up

Non-slip pad to prevent masses from sliding off the block.

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Mass on Incline

Incline set at 30 degrees.

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Hanging Mass

Motion detector on the floor directly beneath the hanging mass.

Derivation

Derive expressions for the force of friction, normal force and coefficient of friction between the block and the inclined surface when the masses are accelerating:

up the incline
down the incline

NOTE - The pulley is massless and frictionless.

pdf

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Incline Lab - Helpful Guidance.pdf

Download

1.7 MB

Data

Record your data in the table below.

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Data Analysis

Using your lab data and derivations to calculate the force of kinetic friction, normal force and coefficient of friction for each trail. Calculate the average coefficient of kinetic friction.

Google Sheets - Calulation Checker

Lab Sheet

David Carroll - Plano West

www.GravityKills.net

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