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This homework problem for introductory physics presents the system of two blocks of equal mass on a ramp, connected by an ideal pulley and subject to friction. Given the angles of incline, mass of the blocks, and coefficient of friction, students must determine the acceleration of the block moving up the incline. A user-activated "help" sequence is provided for each step of the problem-solving, including conceptual analysis, free-body diagrams, and tips to set up the calculations. Immediate feedback is received for both correct and incorrect responses.
Editor's Note: This problem could be quite helpful in introducing students to coefficient of friction. The author's carefully crafted sequence guides each aspect of the problem-solving, from setting up simpler coordinate systems through strategies for doing calculations involving kinetic friction. See Related Items for a closely related, but simpler problem that presents blocks of different masses, but an absence of friction.
Subjects Levels Resource Types
Classical Mechanics
- Motion in Two Dimensions
= 2D Acceleration
- Newton's Second Law
= Force, Acceleration
= Interacting Objects
Education Practices
- Active Learning
= Problem Solving
- High School
- Instructional Material
= Activity
= Best practice
= Problem/Problem Set
= Tutorial
Appropriate Courses Categories Ratings
- Algebra-based Physics
- AP Physics
- Activity
- Assessment
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Intended User:
Learner
Format:
text/html
Access Rights:
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© 2006 University of Illinois Physics Education Research Group
Keywords:
Newton's Second Law, friction, ideal pulley, incline, pulley
Record Cloner:
Metadata instance created January 28, 2008 by Alea Smith
Record Updated:
January 7, 2015 by Caroline Hall
Last Update
when Cataloged:
August 31, 2014
Other Collections:

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AIP Format
G. Gladding, (University of llinois Physics Education Research Group, Urbana, 2006), WWW Document, (http://per.physics.illinois.edu/per/IE/ie.pl?phys111/ie/04/IE_2_blocks_incline).
AJP/PRST-PER
G. Gladding, Illinois PER Interactive Examples: Two Blocks on an Incline, (University of llinois Physics Education Research Group, Urbana, 2006), <http://per.physics.illinois.edu/per/IE/ie.pl?phys111/ie/04/IE_2_blocks_incline>.
APA Format
Gladding, G. (2014, August 31). Illinois PER Interactive Examples: Two Blocks on an Incline. Retrieved December 12, 2018, from University of llinois Physics Education Research Group: http://per.physics.illinois.edu/per/IE/ie.pl?phys111/ie/04/IE_2_blocks_incline
Chicago Format
Gladding, Gary. Illinois PER Interactive Examples: Two Blocks on an Incline. Urbana: University of llinois Physics Education Research Group, August 31, 2014. http://per.physics.illinois.edu/per/IE/ie.pl?phys111/ie/04/IE_2_blocks_incline (accessed 12 December 2018).
MLA Format
Gladding, Gary. Illinois PER Interactive Examples: Two Blocks on an Incline. Urbana: University of llinois Physics Education Research Group, 2006. 31 Aug. 2014. 12 Dec. 2018 <http://per.physics.illinois.edu/per/IE/ie.pl?phys111/ie/04/IE_2_blocks_incline>.
BibTeX Export Format
@misc{ Author = "Gary Gladding", Title = {Illinois PER Interactive Examples: Two Blocks on an Incline}, Publisher = {University of llinois Physics Education Research Group}, Volume = {2018}, Number = {12 December 2018}, Month = {August 31, 2014}, Year = {2006} }
Refer Export Format

%T Illinois PER Interactive Examples: Two Blocks on an Incline
%D August 31, 2014
%I University of llinois Physics Education Research Group
%C Urbana
%U http://per.physics.illinois.edu/per/IE/ie.pl?phys111/ie/04/IE_2_blocks_incline
%O text/html

EndNote Export Format

%0 Electronic Source
%D August 31, 2014
%T Illinois PER Interactive Examples: Two Blocks on an Incline
%I University of llinois Physics Education Research Group
%V 2018
%N 12 December 2018
%8 August 31, 2014
%9 text/html
%U http://per.physics.illinois.edu/per/IE/ie.pl?phys111/ie/04/IE_2_blocks_incline

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### Illinois PER Interactive Examples: Two Blocks on an Incline:

Is Part Of Illinois PER: Interactive Examples

This is the full collection of homework problems by the same author.  It contains six comprehensive problem sets classified by course level.

relation by Caroline Hall
Is By The Same Author and Covers a Similar Topic As Illinois PER Interactive Examples: Two Blocks

This is a closely related, but simpler problem in which the blocks of the system are different in mass, but there is no friction.

relation by Caroline Hall

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