First slide

Introduction to oscillations

Question

A simple pendulum is set into vibrations. The bob of the pendulum comes to rest after some time due to

Easy

A

air friction
B

moment of inertia
C

weight of bob
D

all the above

Solution

due to air friction
$ω = \sqrt{\frac{k}{m} - {[\frac{b}{2 m}]}^{2}} ω = a n g u l a r f r e q u e n c y k = p r o p o g a t i o n c o n s \tan t m = m a s s o f o s c i l l a t o r b = d a m p i n g f a c t o r d u e t o a i r f r i c t i o n a m p l i t u d e o f o s c i l l a t i o n d e c r e a s e s a n d f i n a l l y o s c i l l a t o r c o m e s t o r e s t$

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