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Fundamentals of Stress and Vibration 1. Mathematics for Structural mechanics
[A Practical guide for aspiring Designers / Analysts]

The angular velocity ω of the earth is given by:

2π
ω =
T time taken by the earth to complete one rotation in seconds

2π radians
= = 7.27 × 10 −5
24 ∗ 3600 second
m
Surface velocity of the earth at the equator = ωR = 7.27 × 10 −5 ∗ 6700000 = 487
s

2
∗ 6700000] = 0.035N
For a unit mass, centrifugal force is given by = mω R = [ 7.27 × 10 −5 2

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[Fig 1.75: A sheet metal sink]

Š‡ ƒ‘—– ‘ˆ •Š‡‡– ‡–ƒŽ ‡‡†‡† ˆ‘” –Š‡ •‹ ‹• ƒ• ˆ‘ŽŽ‘™•ǣ

· Š‡ ™‡ †‡˜‡Ž‘’ –Š‡ ‘‡ǡ ™‡ ‰‡– ƒ •‡ –‘” ‘ˆ ƒ ‹” Ž‡Ǥ
· Š‡ ›Ž‹†”‹ ƒŽ ’‘”–‹‘ †‡˜‡Ž‘’• –‘ „‡ ƒ ”‡ –ƒ‰Ž‡Ǥ

QP No. SSC/Q4401, Version 1.0, NSQF Level 7, Compliant with Aero and Auto Industries, Page 77