Home
Class 11
PHYSICS
Assertion : Work done by the frictional ...

Assertion : Work done by the frictional force is negaive
Reason : This is because frictional force acts along the dirction of motion

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:
C
Frictional force always opposes relative motion. Therefore, work done by the frictional force is negative. Assertion is true, reason is false.
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

Work done by a frictional force is

Work done by frictional force

Work done by the force of friction

Frictional force is important for motor racing. This is because, frictional force

Friction force acting on the block is?

A : Work done by the frictional force can’t be positive. R : Frictional force is a conservative force.

A : When a man is walking on a rough road, that work done by frictiona force is zero. R : Frictional force acts in the direction of the motion of the man in this case.

The frictional force acting on 1 kg block is

Assertion :- Work done by frictional force may be sometimes path independent. Reason :- Frictional force is a non - conservative force.

PRADEEP-WORK, ENERGY AND POWER-Assertion-Reason Type Questions
  1. Assertion : A body cannot have energy without possessing momentum but...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  18. Statement-1 : Energy released when a mass of one microgram disappears ...

    Text Solution

    |

  19. This question has statement 1 and statement 2 . Of the four choice giv...

    Text Solution

    |

  20. Statement -1: Two particles moving in the same direction do not lose a...

    Text Solution

    |