Lesson_4.1_Homework

# Lesson_4.1_Homework - Lesson 4.1 Homework 1. Express the...

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Lesson 4.1 Homework 1. Express the following angles in radians. Give your answer as multiples of π . (i) 30 o , (ii) 45 o , (iii) 53 o , (iv) 90 o , (v) 150 o , (vi) 420 o . 2. What is the angular velocity of the earth (i) in its orbit around the sun, (ii) about its axis. 3. A CD-ROM in a computer rotates at 700 rpm. How long will it take for the disc to make one revolution? 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? 5. A bicycle being repaired is turned upside down and the wheel is rotated at a rate of 60 rpm. If the wheel slows uniformly to a stop in 15 s, how many revolutions does it make during this time? 6. A 0.25-m radius flywheel rotates at 3500 rpm. (i) What is its angular velocity in rad s -1 ?, (ii) what is the linear speed and acceleration of a point on the edge of the wheel? 7.

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## This note was uploaded on 05/01/2011 for the course PHY 2048 taught by Professor George during the Fall '10 term at Edison State College.

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Lesson_4.1_Homework - Lesson 4.1 Homework 1. Express the...

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