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K is the force constant of a spring. The...

`K` is the force constant of a spring. The work done in increasing its extension from `l_1` to `l_2` will be

A

`k (l_2 - l_1)`

B

`k ((l_1 + l_2)/(2))`

C

` k (l_2^2 - l_1^2)`

D

`(k)/(2) (l_2^2 - l_1^2)`

Text Solution

Verified by Experts

The correct Answer is:
D
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MOTION-SIMPLE HARMONIC MOTION-EXERCISE -2 (Objective Problems | NEET)
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  6. In a winding (spring) watch, the energy is stored in the form of :

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  7. A spring has length'l' and spring constant 'k'. It is cut into two pie...

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  8. The time period of an oscillating body executing SHM is 0.05 sec and i...

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  9. The mass of a bob, suspended in a simple pendulum, is halved from the ...

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  10. The length of a simple pendulum is 39.2//pi^(2) m. If g=9.8 m//s^(2) ...

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  11. A hollow sphere is taken as bob of a simple pendulum. This hollow sphe...

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  12. The length of a second pendulum is

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  13. The acceleration due to gravity at height R above the surface of the e...

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  14. An oscillating pendulum stops, because its energy

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  15. If the length of a simple pendulum is equal to the radius of the earth...

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  16. when the bob of a simple pendulum swings, the work done by tension in ...

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  17. A body of mass 5 gm is executing S.H.M. about a point with amplitude 1...

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  18. The velocity-time diagram of a harmonic oscillator is shown in the adj...

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  19. The distance between the points of suspension and centre of oscillatio...

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  20. For a compound pendulum, the maximum time period is :

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