# HW3 - Texas A&M University Department of Mechanical...

This preview shows pages 1–2. Sign up to view the full content.

Texas A&M University Department of Mechanical Engineering MEEN 260 Measurement and Instrumentation in Mechanical Engineering Fall 2010 Assignment #3 Due Monday September 27, 2010 Problem 1: (5 Points.) A spring of stiffness 200 N/m is in series with another spring of stiffness 250 N/m. Each spring has 10% uncertainty associated with its value. What will be the nominal stiffness and tolerance of the combination? Problem 2: (5 Points.) An engineer tests two sets of linear springs and determines the stiffness coefficients (N/m) for each spring. Determine if there is a significant difference (95% confidence level) in the stiffness coefficients between the two sets of data given below: Set 1 (N/m) Set 2 (N/m) 22.5 19 22.3 18 22 18 23 23 19 15 18 14.5 22 17 24 18 21 16 19 21 16 23 20 24 23 17 18 24

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Solution September 30, 2010 2 Solution Problem 1: The nominal value here is given by N/m. (1) The tolerance of the combination is given by (2) which means that the combination has a percentage tolerance of or 7.1%.
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 01/03/2011 for the course MEEN 260 taught by Professor Langari during the Fall '08 term at Texas A&M.

### Page1 / 2

HW3 - Texas A&M University Department of Mechanical...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online