CQ100908 - As part of an examination a few years ago a...

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

View Full Document Right Arrow Icon

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

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: As part of an examination a few years ago, a student went through the manipulations on an exam shown at the right. At this point you don't know what the symbols mean, but given the dimensions associated with each symbol, decide whether the conclusion (Eq. D) can possibly be correct. ( A) [M ] = M [ g ] = L/T 2 [h] = L [ ] = 1/T [ v ] = L/T [ R] = L [ I ] = ML2 9/8/10 Mgh = 1 Mv 2 + 1 I 2 2 ( B) Mgh = 1 Mv 2 + 2 (C ) Mgh = Mv + 1 2 2 2 1 2 ( 1 2 ( MR ) MR 2 2 ) 2 2 v R 2 ( D ) gh = 1 v 2 + 1 v 4 2 2 1. Yes 2. No 3. You can’t tell without more information 7 If we agree that (Eq. D) cannot possibly be correct because of dimensions, is it because the starting equation (Eq. A) is dimensionally incorrect? ( A) [M ] = M [ g ] = L/T 2 [h] = L [ ] = 1/T [ v ] = L/T [ R] = L [ I ] = ML2 9/8/10 Mgh = 1 Mv 2 + 1 I 2 2 ( B) Mgh = 1 Mv 2 + 2 (C ) Mgh = Mv + 1 2 2 2 1 2 ( 1 2 ( MR ) MR 2 2 ) 2 2 v R 2 ( D ) gh = 1 v 2 + 1 v 4 2 2 1. Yes 2. No 3. You can’t tell without more information 8 ...
View Full Document

{[ snackBarMessage ]}

Page1 / 2

CQ100908 - As part of an examination a few years ago a...

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

View Full Document Right Arrow Icon
Ask a homework question - tutors are online