Home
Class 11
PHYSICS
The work done by the external agent in s...

The work done by the external agent in stretching a spring of force constant `k` from length `l_(1)`to `l_(2)` is

A

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

B

`1/2k(l_2^2-l_1^2)`

C

`k(l_2-l_1)`

D

`k/2(l_2+l_1)`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • Work, Energy and power

    SL ARORA|Exercise EXERCISE|415 Videos

  • Waves

    SL ARORA|Exercise EXERCISE|558 Videos

  • WORK, POWER AND ENERGY

    SL ARORA|Exercise Type F Based on Collisions|6 Videos

Similar Questions

Explore conceptually related problems

When a 4kg mass in hung vertically from a light spring that obeys Hooke's low, the spring stretches by 2 cm. The work that should be done by an external agent in stretching this spring by 5 cm will be (use g = 10 m//s^(2) )

Work done by an external agent in bringing three particles each of mass m at the vertices of an equilateral triangle of length l is

K is the force constant of a spring. The work donein increasing its extension from l_(1) to l_(2) will be

For a constant force the work done in stretching if spring constant k_(1)gtk_(2) then energy stored in two wire related as

A spring has length'l' and spring constant 'k'. It is cut into two pieces of lengths l_(1) and l_(2) such that l_(1)=nl_(2) . The force constant of the spring of length l_(1) is

A simple spring has length l and force constant K. It is cut into two springs of lengths l_(1) "and" l_(2) such that l_(1) = n l_(2) (n = an integer). The force constant of spring of length l_(1) is

A certain spring that obeys Hook's law is stretched by an external agents. The work done in stretching the spring by 10 cm is 4 J . How much additional work is required to stretch the spring an additional 10 cm ?

20 J work is required to stretch a spring through 0.1 m . Find the force constant of the spring. If the spring is further stretched through 0.1 m. Calculate work done.

SL ARORA-Work, Energy and power-EXERCISE
  1. A uniform rope of total length l is at rest on a table with fraction f...

    Text Solution

    |

  2. The dimensions of K in the equation W=1/2Kx^(2) is

    Text Solution

    |

  3. The work done by the external agent in stretching a spring of force co...

    Text Solution

    |

  4. A spring of force constant 800N//m has an extension of 5cm. The work d...

    Text Solution

    |

  5. Two springs of spring constants 1500N//m and 3000N//m respectively are...

    Text Solution

    |

  6. When a spring is stretched by 2 cm, it stores 100 J of energy. If it i...

    Text Solution

    |

  7. A block of mass m initially at rest is dropped from a height h on to a...

    Text Solution

    |

  8. A 15 gm ball is shot from a spring whose spring has a force constant o...

    Text Solution

    |

  9. When a spring a stretched through a distance x, it exerts a force give...

    Text Solution

    |

  10. The SI unit of power is .

    Text Solution

    |

  11. An electric motor exerts a force of 40 N on a cable and pulls it by a ...

    Text Solution

    |

  12. A particle moves with a velocity (5hati-3hatj+6hatk) ms ^(-1) under t...

    Text Solution

    |

  13. A car of mass 1000kg accelerates uniformly from rest to a velocity of ...

    Text Solution

    |

  14. A constant force F is pushing a 5 kg mass on a horizontal surface at a...

    Text Solution

    |

  15. A car of mass m is driven with acceleration a along a straight level r...

    Text Solution

    |

  16. Power applied to a particle varices with time as P =(3t^(2)-2t + 1) wa...

    Text Solution

    |

  17. An electric pump is used to fill an overhead tank of capacity 9m3 kept...

    Text Solution

    |

  18. In an inelastic collision, what is conserved

    Text Solution

    |

  19. A bullet is fired and gets embedded in a block kept on table. If table...

    Text Solution

    |

  20. A particle of mass m1 moves with velocity v1 and collides with another...

    Text Solution

    |