Home
Class 12
PHYSICS
Assertion: On a rainy day, it is difficu...

Assertion: On a rainy day, it is difficult to drive a car or bus at high speed.
Reason: The value of coefficient of friction is lowered due to wetting of the surface.

A

If both assertion `&` Reason are True `&` the Reason is a corrrect explanation of the Asserion.

B

If both Assertion `&` Reason are True but Reason is not correct explanation of the Assertion.

C

If Assertion is Trie but the Reason is False.

D

If both Assertion `&` Reason are false

Text Solution

Verified by Experts

The correct Answer is:
A
`mudownarrow` with moisture of surfaces.
Promotional Banner

Topper's Solved these Questions

  • NEWTONS LAWS OF MOTION

    ALLEN |Exercise EXERCISE-II|112 Videos

  • NEWTON'S LAWS OF MOTION & FRICTION

    ALLEN |Exercise EXERCISE (JA)|4 Videos

  • RACE

    ALLEN |Exercise Basic Maths (Wave Motion & Dopplers Effect) (Stationary waves & doppler effect, beats)|25 Videos

Similar Questions

Explore conceptually related problems

Assertion: When brakes are applied on a wet road, a car is likely to skid. Reason: Brakes prevent rotation of the wheels, and there is not sufficient friction between the road and the whells.

On complete combustion a litre of petrol gives off heat equivalent to 3 xx 10^(7) J. In a test drive, a car weighing 1200 kg including the mass of driver, runs 15 km per litre while moving with a uniform speed on a straight track. Assuming that friction offered by the road surface and air to be uniform. calculate the force of friction acting on the car during the test drive. if the efficiency of the car engine were 0.5.

Assertion: When a force vecF attempts to slide a body along a surface, a frictional force parallel to the surface and directed so as to oppose the sliding, is exerted on the body by the surface. Reason: It is due to the bonding between the body and the surface.

In the arrangement shown in the figure, mass of the block B and A is 2m and m respectively. Surface between B and floor is smooth. The block B is connected to the block C by means of a string-pulley system. If the whole system is released, then find the minimum value of mass of block C so that A remains stationary w.e.t. B. Coefficient of friction between A and B is mu.

ALLEN -NEWTONS LAWS OF MOTION-EXERCISE-III
  1. Assertion: A man in a dosed cabin falling freely does not experience g...

    Text Solution

    |

  2. Assertion : Angle of repose is equal to angle of limiting friction. ...

    Text Solution

    |

  3. Assertion: On a rainy day, it is difficult to drive a car or bus at h...

    Text Solution

    |

  4. Assertion: Force of friction depends on the actual area of contact. ...

    Text Solution

    |

  5. Assertion: Static frictional force is a self adjusting force. Reason...

    Text Solution

    |

  6. Assertion : A body can be at rest even when it is under the action of ...

    Text Solution

    |

  7. Assertion: Frictional force is the component of contact force parallel...

    Text Solution

    |

  8. Assertion: Newton's first law can be derived from the second law. Re...

    Text Solution

    |

  9. These questions consists of two statements each printed as Assertion a...

    Text Solution

    |

  10. Assertion: Pseudo force is an imaginary force which is recongnised on...

    Text Solution

    |

  11. Assertion: A table cloth can be pulled from a table without dislodding...

    Text Solution

    |

  12. Assertion: Friction is a self-adjusting force. Reason: A block on th...

    Text Solution

    |

  13. Assertion: The apparent weight of a person standing in a lift which mo...

    Text Solution

    |

  14. Assertion: A body of weight 10N (W) is at rest on an inclined plane (m...

    Text Solution

    |

  15. Assertion: When a force vecF attempts to slide a body along a surface,...

    Text Solution

    |

  16. Assertion: Mass is a property of one object alone, whereas weight resu...

    Text Solution

    |

  17. Assertion: When brakes are applied on a wet road, a car is likely to s...

    Text Solution

    |

  18. Assertion : The force of tension on a body always act away from the bo...

    Text Solution

    |

  19. Assertion: It is difficult to move a heavy box by sliding whereas it b...

    Text Solution

    |

  20. Assertion: Every mutual intraction between two bodies always follow th...

    Text Solution

    |