Mains roll no. are out -IV
Classical Mechanics
Level
3
The amplitude of a damped oscillator decreases to 0.9 times its original magnitude is 5s.
In another 10s it will decrease to α times its original magnitude, where α equals...........................
(~ represents approximate value )
0.81
0.729
~0.9
~0.983
0.3
0.27
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
1 solution
Use A = A ( o ) e ( − b t / 2 m ) .The given time being 3 times the amplitude falls ( 9 / 1 0 ) 3 = 7 2 9 / 1 0 0 0 times