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One end of a massless spring of spring constant k and natural length l 0 is fixed while the other end is connected to a small object of mass m lying on a frictionless table. The spring remains horizontal on the table. If the object is made to rotate at an angular velocity ω about an axis passing through fixed end, then the elongation of the spring will be :

1. 2 0 2 m m k ω ω − l
2. 2 0 2 m k m ω + ω l
3. 2 0 2 m k m ω − ω l
4. 2 0 2 m m k ω ω + l CAREER POINT CAREER POINT Ltd., CP Tower, IPIA, Road No.1, Kota (Raj.), Ph: 080-47250011 www.careerpoint.ac.in 2 JEE Main Online Paper

Correct answer: 2 0 2 m k m ω − ω l

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