Lesson_4.1_Homework_Solution

Lesson_4.1_Homework_Solution - Lesson 4.1 Homework...

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 DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Lesson 4.1 Homework Solutions 1. Express the following angles in radians. Give your answer as multiples of . (i) 30 o , (ii) 45 o , (iii) 53 o , (iv) 90 o , (v) 150 o , (vi) 420 o . 5 7 ( ) ( ) ( ) 0.29 ( ) ( ) ( ) 6 4 2 6 3 i i i i i i i v v v i 2. What is the angular velocity of the earth (i) in its orbit around the sun, (ii) about its axis? ( i) The earth goes round the sun in 365 days. 7 1 2 , 365 24 60 60 2 365 24 60 60 1.99 10 rad s t s t = = = = = (ii) The earth rotates completely once about its axis in 24 h 5 1 2 , 24 60 60 2 24 60 6 7.3 1 t s r s t ad = = = = = 3. A CD-ROM in a computer rotates at 700 rpm. How long will it take for the disc to make one revolution? The time taken for 700 revolutions = 1 minute = 60 s The time taken for one revolution is: 1 60 700 revolutio 0.086 ns s re l s vo = = 4. A turn table set for 45 rpm is turned on and reached its operating speed in 1.25 s. What is the average angular acceleration of the turn table? - 2 1 45 2 0, 45 rpm rad s , 1.25 60 45 2 60 1 ....
View Full Document

Page1 / 5

Lesson_4.1_Homework_Solution - Lesson 4.1 Homework...

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