CBSE Class 11-science Answered
please answer
![question image](http://images.topperlearning.com/topper/new-ate/top_mob16737136895242518194cad806-439b-4488-870c-b4de77751ded.jpg)
Asked by gdeadshot85 | 14 Jan, 2023, 21:58: PM
![](https://images.topperlearning.com/topper/tinymce/imagemanager/files/8fc5ea2bf5884eca1d4c0121fdfe84a763c372b82ae0f0.05995930f1.png)
Figure shows the system of two masses m and 2m that are connected by a string of length 2l.
This system is placed on a smooth horizontal surface.
Initially masses are separated by a distance l and mass 2m is given a velocity v.
when the string is taut , mass 2m will be in circular motion as shown in figure .
Speed w of mass 2m just after the string is taut is determined by conservation of angular momentum.
initial angular momentum just before string is taut = ( 2m) × v × sin30 = m v
Angular momentum just after string is taut = I ω =
= ( 4 × m × l × w )
![begin mathsize 14px style 2 m space cross times space left parenthesis 2 l right parenthesis squared cross times fraction numerator w over denominator 2 l end fraction end style](https://images.topperlearning.com/topper/tinymce/cache/ff6bb772da59ea83000960091fb9a388.png)
where I is moment of inertia of system about the axis passing through mass m and
ω is angular speed of mass 2m just after string is taut.
( 4 × m × l × w ) = ( m v )
w = v / (4l)
Answered by Thiyagarajan K | 15 Jan, 2023, 09:10: AM
Concept Videos
CBSE 11-science - Physics
Asked by gdeadshot85 | 14 Jan, 2023, 21:58: PM
CBSE 11-science - Physics
Asked by Topperlearning User | 06 Aug, 2014, 09:34: AM
CBSE 11-science - Physics
Asked by Topperlearning User | 06 Aug, 2014, 09:37: AM
CBSE 11-science - Physics
Asked by Topperlearning User | 06 Aug, 2014, 09:45: AM
CBSE 11-science - Physics
Asked by Topperlearning User | 04 Jun, 2014, 13:23: PM
CBSE 11-science - Physics
Asked by Topperlearning User | 06 Aug, 2014, 11:19: AM
CBSE 11-science - Physics
Asked by Topperlearning User | 06 Aug, 2014, 10:19: AM
CBSE 11-science - Physics
Asked by Topperlearning User | 06 Aug, 2014, 10:46: AM
CBSE 11-science - Physics
Asked by Topperlearning User | 06 Aug, 2014, 11:00: AM
CBSE 11-science - Physics
Asked by Topperlearning User | 04 Jun, 2014, 13:23: PM