[:PiraScheme#Mechanics: Table of Mechanics Demonstration]

[:MEEquipmentList: List of Mechanics Equipment & Supplies]

[:Demonstrations:Lecture Demonstrations]

Simple Block on a String, 1J30.

Topic and Concept:


attachment:BlockonString-400.jpg attachment:PulledBlockonString-400.jpg


This is a concept demo. Describe/Depict all Forces that are acting on the block when stationary, being pushed by a finger, or pulled by it's string.



ID Number


ME, Bay B5, Shelf #2

Important Setup Notes:

Setup and Procedure:

  1. Explain the different forces acting on the block.

Cautions, Warnings, or Safety Concerns:

Discussion: As an example, if the block sits on the table, there are two forces acting on it: gravity due to the earth and the normal force due to the table. If the block is pulled accross the table, there are four forces acting on the block: in addition the aforementioned two, there is now the tension due to the string and friction due to the table.