Home
Class 12
PHYSICS
Assertion: Force of friction depends on ...

Assertion: Force of friction depends on the actual area of contact.
Reason: Larger the area of actual contact, larger is oppose to motion.

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
Force of friction `uparrow` with `uparrow` of actual area.
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: Frictional force is the component of contact force parallel to the surface. Reason: Friction force always opposes the motion of a body.

Maximum static friction force depend on area of surfaces in contact.

Assertion :- The shape of trajactory depends on the acceleration and intial condition of motion. Reason :- Trajectory of an object moving under a constant acceleration may be a straight line.

A heavy and a light cylindrical rollers of diameter D and d respectively rest on a horizontal plane as shown. The larger roller has a string wound around it to which a horizontal force 'P' can be applied as shown. Assuming 'mu' (coefficient of friction) is same at all surfaces of contact, find the critical value of 'mu' such that larger roller can be just pulled over smaller one.

Assertion: When a person walks on a rough surface, the frictional force exerted by the surface on the person is opposite to the direction of tendenc of motion his leg. Reason: If a body moves with constant velocity, then it means that body is moving along straight line & there is no acceleration.

Assertion : The force of tension on a body always act away from the body. Reason: Friction force always opposes the motion of a body.

Assertion: Newton's second law of motion gives the measurement of force. Reason: According to Newton's second law of motion, force is directly proportional to the rate of change of momentum.

Assertion :- When a man climbs the rope friction force acts in downward direction. Reason :- Friction force opposes relative motion to tendency of relative motion between two contact surfaces.

Assertion: Static frictional force is a self adjusting force. Reason: Force of static friction does not depend upon the mass of the body.

Assertion : Angle of repose is equal to angle of limiting friction. Reason : When the body is just at the point of motion, the force of friction in this stage is called as limiting friction.

ALLEN -NEWTONS LAWS OF MOTION-EXERCISE-III
  1. Assertion : Angle of repose is equal to angle of limiting friction. ...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  20. Assertion: Static slides down an inclined plane if the angle of fricti...

    Text Solution

    |