A1643FORCEBOARDFORCOMPOSITIONANSDECOMPOSITIONOFFORCEFordemonstratingthevectorialrelationbetweentheresultantforceanditscomponentforcesunderthebalancecondition.SPECIFICATIONAdjustableangleofresultantforce:30 -80 Adjustableangleofcomponentforce:60 Measuringerror: 30