Home
Class 11
PHYSICS
Assertion : Work is done only by conserv...

Assertion : Work is done only by conservative force.
Reason : Non conservative forces are no good to do any work.

A

If both, Assertion and Reason are true and Reason is correct explantion of Assertion.

B

If both, Assertion and Reason are true but Reason is not a correct explanation of the Assertion.

C

If Assertion is true but the Reason is false.

D

If both, Assertion and Reason are false.

Text Solution

Verified by Experts

The correct Answer is:
D

Here, both Assertion and Reason are false.
Work is done by both, conservative as well as non`-` conservative forces.
Promotional Banner

Topper's Solved these Questions

  • WORK, ENERGY AND POWER

    PRADEEP|Exercise Integer Type Questions|9 Videos
  • THERMODYNAMICS

    PRADEEP|Exercise Assertion- Reason Type Questions|19 Videos

Similar Questions

Explore conceptually related problems

Concept of conservative and non conservative force

Potential Energy || Conservative and Non-conservative Forces

Is friction a non-conservative force?

Friction is non-conservative force. How ?

Can work done by a non - conservative force be positive ?

Work done by the conservative force on a system is equal to :

A force is said to be conservative if work done by or agains the force depends only on initial and final positions of the body and not on the nature of path followed. A force is said to be non-conservative, if work done by or against the force in moving a body from one position to another, depeds on the path followed between these two positions. Potential energy is defined only for conservative forces. It does not exist for non-conservative forces. Read the above passage and answer the following question : (i) Give two examples, each for conservative and non-conservative forces. (ii) Potential energy does not exist for non-conservative forces. What does it imply ini day to day life ?

Is work done by a non conservative force always negative ? Comment.

PRADEEP-WORK, ENERGY AND POWER-Assertion-Reason Type Questions
  1. Assertion : When two equal masses undergo a glancing elastic collision...

    Text Solution

    |

  2. Assertion: According to law of conservation of machainical energy chan...

    Text Solution

    |

  3. Assertion : Work is done only by conservative force. Reason : Non co...

    Text Solution

    |

  4. Assertion : A body cannot have energy without possessing momentum but...

    Text Solution

    |

  5. Assertion: A quick collision between two bodies is more violent that s...

    Text Solution

    |

  6. Assertion : Work done by the frictional force is negaive Reason : Th...

    Text Solution

    |

  7. Assertion : Work done by the centripetal force in moving a body along...

    Text Solution

    |

  8. Assertion : Work done by or against gravitational force in moving a b...

    Text Solution

    |

  9. Assertion : Work done by orforce of friction in moving a body through...

    Text Solution

    |

  10. Assertion : Time taken by a body to complete a given work has nothing ...

    Text Solution

    |

  11. Assertion: A spring has potential energy , both when it is compressed ...

    Text Solution

    |

  12. Assertion : Graph between potential energy of a spring versus the exte...

    Text Solution

    |

  13. Assertion : When current is drawn from a cell, chemical energy is conv...

    Text Solution

    |

  14. STATEMENT-l : In an elastic collision between two bodies, the relative...

    Text Solution

    |

  15. Assertion: Mass and energy are not conserved separately, but are conse...

    Text Solution

    |

  16. Statement-1 : Kinetic energy is conserved in both, perfectly elastic a...

    Text Solution

    |

  17. Statement-1 : For any collision, coefficient of restitution (e0 lies ...

    Text Solution

    |

  18. Statement -1 : When momentum (p) of a body is increased by 50%, its KE...

    Text Solution

    |

  19. Statement-1 : Friction is non-conservation force. Statement-2 : This...

    Text Solution

    |

  20. Statement-1 : A body with negative energy cannot have momentum. Stat...

    Text Solution

    |