Module 4 - Module 4 1 If you have trouble with the problem...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Module 4 . 1 , If you have trouble with the problem post your question on the discussion . Cafe You will not be able to see other postings on your problems until you have . posted your solutions , You must state which problem you are doing you may have - - to include a free body diagram or other diagram if it helps your . discussion You must show units and . explain each step The format that is used in the text book is similar to the way . you will discuss the problem . 2 , If you have problems with the problem you will have the opportunity to ask the . group for help Other class members will have the opportunity to help with the . problem and earn some points . 3 . You must critique your classmate's work ( " " .) Saying good job is not appropriate . You cannot fall behind in class Module 4 covers chapters , 8 9 and . 10 : Chapter : 8 . 11 . The sun appears to move across the sky because the earth spins on its axis , = . - To a person standing on the earth the sun subtends an angle of θsun 9 28 x 10 3rad . ( ) see conceptual example 2 How much time in seconds does it take for the sun to move a distance equal to its own diameter? : Convert radian to degree = . - . °= . ° θsun 9 28 x 10 3 rad57 3 0 5317 : Seconds in 24 hours = , 24 hours60 minutes60 seconds 86 400s = ° 1 revolution of the sun 360 . ° ° , = . , . 0 5317 360 86 400 s 0 001476986 400s 127 61s . 25 + . / . , The wheels of a bicycle have an angular velocity of 20 0 rads second Then . , the brakes are applied In coming to rest each wheel makes an angular + . . displacement of 15 92 revolutions ) a How much time does it take for the bike to come to rest? = + = + . + . / + / = . t 2θω0 ω 2 15 92 rev2π rad1 rev 20 0 rad s 0 rad s 10 00 s
Background image of page 1

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

View Full DocumentRight Arrow Icon
) ( / ) b What is the angular acceleration in rads s2 of each wheel? = - = / - . / . =- . / α ω ω0t 0 rad s 20 0 rad s10 0s 2 00 rad s2 . 35 - - , On a reel to reel tape deck the tape is pulled past the playback head at a . / . constant linear speed of 0 381m s ) , - . a Using the data in part a of the drawing find the angular speed of the take up reel = = . / . =+ . / ω0 vTr 0 381 m s0 0508 m 7 50 rad s
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 07/24/2010 for the course PHYSICS ph205 taught by Professor Brumm during the Spring '10 term at Grantham.

Page1 / 6

Module 4 - Module 4 1 If you have trouble with the problem...

This preview shows document pages 1 - 3. Sign up to view the full document.

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