Home
Class 11
PHYSICS
A spring of force constant 800 Nm^(-1) h...

A spring of force constant 800 `Nm^(-1)` has an extension of 5 cm. The work done in extending it from 5 cm to 15 cn is

A

16J

B

8J

C

32J

D

24 J

Text Solution

Verified by Experts

The correct Answer is:
B
`W_(C)=-DeltaU`
`=(U_("final")-U_("initial"))`
`=-(1/2xxkxx15^(2)-1/2xxkxx5^(2))` ltBrgt `W_(c)=8` joule
Promotional Banner

Topper's Solved these Questions

  • WAVE OPTICS

    RESONANCE ENGLISH|Exercise Exercise|35 Videos

Similar Questions

Explore conceptually related problems

A spring of force constant 800 N/m has an extension of 5 cm. The work done in extending it from 5 cm to 15 cm is:

A spring of force constant 800N//m has an extension of 5cm. The work done in extending it from 5cm to 15cm is

A spring of force constant 600 Nm^(-1) is mounted on a horizontal table. A mass of 1.5 kg is attached to the free end of the spring,pulled sideways to a distance of 2 cm and released . The speed of the mass when the spring is compressed by 1 cm is

A spring of force constant 600 Nm^(-1) is mounted on a horizontal table. A mass of 1.5 kg is attached to the free end of the spring, pulled sideways to a distance of 2 cm and released .P.E. of the mass when it momentarily comes to rest and total energy are

A light spring of force constant 8 Nm^(-1) is cut into two equal halves and the two are connected in parallel, the equivalent force constant of the system is

Find the ratio of 90 cm to 1.5 m.

A 2.5 kg collar attached to a spring of foce constant 1000 Nm^(-1) slides without friction on a horizontal rod. The collar is displaced from its equilibrium position by 5.0 cm and released. Calculate (i) the period of oscillation (ii) the maximum speed of the collar and (iii) the maximum acceleration of the collar.

A mass of 1.5 kg is connected to two identical springs each of force constant 300 Nm^(-1) as shown in the figure. If the mass is displaced from its equilibrium position by 10 cm, then maximum speed of the trolley is

A mass of 1.5 kg is connected to two identical springs each of force constant 300 Nm^(-1) as shown in the figure. If the mass is displaced from its equilibrium position by 10cm, then the period of oscillation is

Two springs of force constants 7 Nm^(-1) and 9 Nm^(-1) are connected in parallel and is fixed to body of mass 100 g. Find the period of oscillation.

RESONANCE ENGLISH-WORK POWER AND ENERGY-Exercise
  1. A body is falling under gravity . When it loses a gravitational potent...

    Text Solution

    |

  2. A block of mass m is attached to two unstretched springs of spring con...

    Text Solution

    |

  3. A body of mass m dropped from a certain height strikes a light vertica...

    Text Solution

    |

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

    Text Solution

    |

  5. An electric motor creates a tension of 4500 newton in a hoisting cable...

    Text Solution

    |

  6. The potential energy of a partical veries with distance x as shown in ...

    Text Solution

    |

  7. The potential energy of a force filed vec(F) is given by U(x,y)=sin(x+...

    Text Solution

    |

  8. A spring of force constant 800 Nm^(-1) has an extension of 5 cm. The w...

    Text Solution

    |

  9. A body is moved along a straight line by a machine delivering constant...

    Text Solution

    |

  10. The total work done on a particle is equal to the change in its mechan...

    Text Solution

    |

  11. A ring of mass m can slide over a smooth vertical rod. The ring is con...

    Text Solution

    |

  12. The kinetic energy of a particle continuously increases with time. The...

    Text Solution

    |

  13. If force is always parallel to motion

    Text Solution

    |

  14. The given plot shows the variation of U, the potential energy of inter...

    Text Solution

    |

  15. A body of mass 5 kg is acted upon by a variable force.the force varies...

    Text Solution

    |

  16. An elevatore weighinig 500kg is to be lifted up at a constant velocity...

    Text Solution

    |

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

    Text Solution

    |

  18. The potential energy of a system increase,if work is done

    Text Solution

    |

  19. Statement-1: A person walking on a horizontal road with a load on his ...

    Text Solution

    |

  20. Statement-1: Graph between potential energy of spring versus the exten...

    Text Solution

    |