Home
Class 11
PHYSICS
If under the action of variable force ov...

If under the action of variable force `overset rarr F`,a body is displaced by `overset rarr S`,the work done is given by:

A

FS

B

`overset rarr F * overset rarr S`

C

`oversetSunderset0intvecF.vec(ds)`

D

`vec F xx vec F`.

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • WORK,ENERGY AND POWER

    JBD PUBLICATION|Exercise EXAMPLE|109 Videos
  • Thermodynamics

    JBD PUBLICATION|Exercise EXAMPLE|69 Videos

Similar Questions

Explore conceptually related problems

If overset rarr A + overset rarr B = overset rarr A - overset rarr B ,then:

The displacement x of a body of mass 10 kg moving in one dimension under the action of a constant force is related to time by the equation t = sqrtx + 3 . Find the work done by the force in first 5 seconds.

Is the magnitude of (overset rarr A - overset rarr B) same as that of (overset rarr B - overset rarr A) ?

If the magnitude of vectors overset rarr P,overset rarr Q and oversert rarr R are 3,4 and 5 units respectively,and if overset rarr P + overset rarr Q = overset rarr R ,then what will be the angle between overset rarr P and overset rarr R ?

Explain work done by a variable force.

Three vectors overset rarr P,overset rarr Q and overset rarr R satisfy the relations overset rarr P cdot overset rarr Q = 0 and overset rarr P * overset rarr R = 0 .To which vector, the vector overset rarr P is parallel to .

The dimensions of the quantity overset rarr E xx overset rarr B ,wehre overset rarr E represents the electric field and overset rarr B the magnetic field may be given as:

At what angles do the two fores (overset rarr P + overset rarr Q ) adn (overst rarr P - overset rarr Q) act so that the agnitude of the resultantts is sqrt(2(P^2 + Q^2 ) ) ?

If sum and difference of two vectors overset rarr R and overset rarr S are at right angle equal to each other, then show that the vectors are equal in magnitude.

Complete the reaction : NH_4NO_3 (s) overset(Heat) rarr

JBD PUBLICATION-WORK,ENERGY AND POWER-EXAMPLE
  1. If under the action of variable force overset rarr F,a body is displac...

    Text Solution

    |

  2. What is SI unit of work?

    Text Solution

    |

  3. What is the relation between watt and horse power?

    Text Solution

    |

  4. What is the S.I. unit of energy?

    Text Solution

    |

  5. What is the SI unit of power ?

    Text Solution

    |

  6. Can acceleration be produced without doing any work?

    Text Solution

    |

  7. What is the work done in holding a 15 kg suitcase whiel waiting for a...

    Text Solution

    |

  8. An arrow is shot from a bow, from where does it get kinetic energy?

    Text Solution

    |

  9. What kind of energy is stored in a dam?

    Text Solution

    |

  10. What kind of energy is stored in a spring?

    Text Solution

    |

  11. Is mass of a body conserved?

    Text Solution

    |

  12. What is the work done by centripetal force?/

    Text Solution

    |

  13. What it Einstein's mass energy relation?

    Text Solution

    |

  14. For a force to do maximum work, what should be the angle between force...

    Text Solution

    |

  15. Can potential nergy of an object be negative?

    Text Solution

    |

  16. Can KE of a system be increased or decreased without the application o...

    Text Solution

    |

  17. Is linear momentum of any system always conserved?

    Text Solution

    |

  18. Name motion in which momentum changes but K.E. remains constant.

    Text Solution

    |

  19. Out of joule ,calories ,kilowatt and million electron volt,which one i...

    Text Solution

    |

  20. Does the work done in raising a box on a platform depend upon how fast...

    Text Solution

    |

  21. How many ergs are there in one joule?

    Text Solution

    |