Home
Class 12
PHYSICS
Assertion: When a person walks on a roug...

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.

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:
B
Reason do not explain assertion.
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)|24 Videos

Similar Questions

Explore conceptually related problems

"When a person walks on a rough surface the frictional force exerted by the surface on the person is opposite to the direction of his motion". Is it true or false ?

When a person walks on a rough surface, the frictional force exerted by surface on the person is opposite to the direction of his motion. It is the force exerted by the road on the person that causes the motion.

(A) : A person can walk on a rough surface (R) : Reaction of the force applied by the man on the surface keeps him moving

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.

A body with constant acceleration always moves along a straight line. A body with constant magnitude of acceleration may not speed up.

Assertion: Frictional force is the component of contact force parallel to the surface. Reason: Friction force always opposes the motion of a body.

Assertion: When a body accelerates down an incline rolling purely. Static friction force acts on the body. Reason: Point of contact of the body with incline remains at rest.

(A) : When a body moves on rough surface the mechanical energy is not constant (R) : Friction is non conservative force

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

(A) : When a bicycle is in motion, the force of friction exerted by the ground on the two wheels is always in forward direction. (R ) : The frictional force only when the bodies are in contact.

ALLEN-NEWTONS LAWS OF MOTION-EXERCISE-III
  1. Assertion: Frictional force is the component of contact force parallel...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  7. Assertion : The apparent weight of a body in an clevator moving downwa...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  15. Assertion: A body slides down an inclined plane if the angle of fricti...

    Text Solution

    |

  16. Assertion: Magnitude of the contact force is always greater than the m...

    Text Solution

    |

  17. Assertion: When a person walks on a rough surface, the frictional forc...

    Text Solution

    |

  18. Assertion: Newton's second law of motion gives the measurement of forc...

    Text Solution

    |

  19. Assertion: Pulling a lawn roller is easier than pushing it. Reason:P...

    Text Solution

    |

  20. Assertion: A man who falls from aheight on a cement floor receive more...

    Text Solution

    |