Answered: ou are abducted by aliens and find…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

: You are abducted by aliens and find yourself locked in a large room on some strange
planet. To pass the time, you decide to do some experiments using a ball-and-chain that
you find on the floor. You make the following estimates:
mBALL  7 kg ,
mCHAIN  0.5 kg
, and
 CHAIN  2 m .
(a) When you hold the free end of the chain above your head and allow the ball to swing
like a pendulum, you use your wristwatch to measure the period as
T  4 s
. What is the
acceleration due to gravity on this planet?
(b) If the ball accidentally hits a wall, how long does it take for this jolt in the chain to
travel up to your hand?

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