Home
Class 11
PHYSICS
No work is done by a force on an object ...

No work is done by a force on an object if
a) the force is always perpendicular to its velocity
b) the force is always perpendicular to its acceleration
.c) the object is stationary but the point of application of the force moves on the object
d) the object moves in such a way that the point of application of the force remains fixed.

A

b, c &d are correct

B

a, b & d are correc

C

a, c &d are correc

D

all are correct

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • WORK, POWER & ENERGY

    AAKASH SERIES|Exercise EXERCISE - II (SCALARS (OR) DOT PRODUCT)|9 Videos

  • WORK, POWER & ENERGY

    AAKASH SERIES|Exercise EXERCISE - II (WORK)|20 Videos

  • WORK, POWER & ENERGY

    AAKASH SERIES|Exercise PRACTICE EXERCISE (PERFECTLY INELASTIC COLLISIONS)|5 Videos

  • WORK POWER ENERGY

    AAKASH SERIES|Exercise EXERCISE - 3|61 Videos

Similar Questions

Explore conceptually related problems

(A) : Magnetic force is always perpendicular to the magnetic field (R) : Electric force is along the direction of electric field.

In a projectile motion the velocity (a) is always perpendicular to the acceleration (b) is not always perpendicular to the acceleration (c) is perpendicular to the acceleration for one instant only (d) is perpendicular to the acceleration for two instants.

What would be the work done when the force on the object is zero ?

A particle is acted upon by constant magnitude force perpendicular to it which is always perpendicular to velocity of particle. The motion is taking place in a plane it follows that:

Give few examples where displacement of an object is in the direction opposite to the force acting on the object.

If the displacement of the object is in the direction opposite to the direction of force applied, then the work done is ……………….

AAKASH SERIES-WORK, POWER & ENERGY -EXERCISE - I
  1. A sphere of mass M,, moving with a velocity V0 collides head on with a...

    Text Solution

    |

  2. Let us assume that you have lifted a suitcase and kept it on a table. ...

    Text Solution

    |

  3. No work is done by a force on an object if a) the force is always p...

    Text Solution

    |

  4. The kinetic energy of a particle continuously increases with time. ...

    Text Solution

    |

  5. One end of a light spring of spring constnat k is fixed to a wall and ...

    Text Solution

    |

  6. Statement A: An engine A can perform a given work in 1 hr and engine B...

    Text Solution

    |

  7. . Statement A: Energy is the cause for doing work and work is the effe...

    Text Solution

    |

  8. (A): A spring has potential energy, both when it is compressed or stre...

    Text Solution

    |

  9. A) When a body slides on rough surface, its momentum is not conserved....

    Text Solution

    |

  10. A) Collision doesn.t require physical contact B) Collision between ...

    Text Solution

    |

  11. A) For any collision, momentum transfer takes place. B) In any colli...

    Text Solution

    |

  12. (A): Collision between two fundamental particles is elastic (R) : Fu...

    Text Solution

    |

  13. A) When external forces are involved, momentum of the system is not co...

    Text Solution

    |

  14. A) When a ball hits a wall (stationary) it returns back with same velo...

    Text Solution

    |

  15. For a system to follow the law of conservation of linear momentum duri...

    Text Solution

    |

  16. Consider the following statements A and B. Identify the correct choice...

    Text Solution

    |

  17. . (A): Comets move around the sun in elliptical orbits. The gravitatio...

    Text Solution

    |

  18. . A sphere A moving with a speed .U. and rotating with an angualr velo...

    Text Solution

    |

  19. A body is in motion and it is stopped by applying retarding force. Ini...

    Text Solution

    |

  20. (A): When two bodies of equal masses collide, their veloctities are al...

    Text Solution

    |