Home
Class 11
PHYSICS
A block of mass 20 kg is moving in x-dir...

A block of mass 20 kg is moving in x-direction with a constant speed of 10 `ms^(-1)`. It is subjected to a retarding force `F=(-0.1x)N` during its travel from x=20 m to x=30 m. Its final kinetic energy will be

A

475 J

B

450 J

C

275 J

D

250 J

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
SL ARORA-Work, Energy and power-EXERCISE
  1. The kinetic energy of a body becomes four times its initial value.The ...

    Text Solution

    |

  2. A body of mass 5 kg is moving with a momentum of 10 kg m//s. A force ...

    Text Solution

    |

  3. A block of mass 20 kg is moving in x-direction with a constant speed o...

    Text Solution

    |

  4. The decrease in the potential energy of a ball of mass 20 kg which fal...

    Text Solution

    |

  5. If the water falls from a dam into a turbine wheel 19.6 m below, then...

    Text Solution

    |

  6. A gun fires a bullet of mass 50 g with a velociy of 30 m//s. Due to t...

    Text Solution

    |

  7. A body of mass 5 kg is raised vertically to a height of 10 m by a forc...

    Text Solution

    |

  8. A bomb of mass 3.0 kg explodes in air into two pieces of masses 2.0 kg...

    Text Solution

    |

  9. If a spring extends by x on loading, then the energy stored by the spr...

    Text Solution

    |

  10. A spring 40 mm long is stretched by the application of a force. If 10 ...

    Text Solution

    |

  11. The figure shows a smooth curved track terminating in a smooth horizon...

    Text Solution

    |

  12. A particle moves along a curve of unknown shape but magnitude of force...

    Text Solution

    |

  13. Which of the following is true ?

    Text Solution

    |

  14. Two particles are seen to collide and move jointly together after the ...

    Text Solution

    |

  15. A metal ball of mass 2 kg moving with a velocity of 36km//h has a head...

    Text Solution

    |

  16. A particle of mass m, moving with velocity v collides a stationary par...

    Text Solution

    |

  17. In an elastic collision

    Text Solution

    |

  18. A body of mass 4 kg moving with velocity 12 m//s collides with another...

    Text Solution

    |

  19. A block having mass m collides with an another stationary block having...

    Text Solution

    |

  20. A ball is bouncing down a set of stairs. The coefficient of restitutio...

    Text Solution

    |