Home
Class 11
PHYSICS
A force vec F = (5 vec i+ 3 vec j+ 2 vec...

A force `vec F = (5 vec i+ 3 vec j+ 2 vec k) N` is applied over a particle which displaces it from its origin to the point `vec r=(2 vec i- vec j) m`. The work done on the particle in joules is.

A

`+ 10`

B

`+ 7`

C

`-7`

D

`+ 13`

Text Solution

Verified by Experts

The correct Answer is:
B
Here, `W = vec F. vec S`
=`(5 hat i + 3 hat j + 3hat k).(2 hat i - hat j) = 10 -3 = 7 J`.
Promotional Banner

Topper's Solved these Questions

  • WORK POWER AND ENERGY

    NARAYNA|Exercise Level-V (Single Answer)|24 Videos

  • WORK POWER AND ENERGY

    NARAYNA|Exercise Level-V (Multiple Answer)|13 Videos

  • WORK POWER AND ENERGY

    NARAYNA|Exercise Level- III (C.W)|50 Videos

  • WORK , ENERGY & POWER

    NARAYNA|Exercise EXERCISE IV|43 Videos

Similar Questions

Explore conceptually related problems

A force vec(F) = (5hat(i) + 3hat(j)) N is applied over a particle which displaces it from its origin to the point vec(r ) = (2hat(i) - 1hat(j)) meter. The work done on the particle is :

A force vec(F)=(5hat(i)+3hat(j)+2hat(k))N is applied over a particle which displaces it from its origin to the point vec(r)=(2hat(i)-hat(j))m . The work done on the particle in joules is-

| 2vec i-3vec j + vec k | =

A force F = (2 vec i + vec j + vec k)N is acting on a particle moving with constant velocity vec v = (vec i + 2 vec j + vec k)m/s . Power delivered by force is

A force vec F = 3 vec i + 2 vec j - 4 vec k is acting at the point (1,-1, 2) . Find the vector moment of vec F about the point (2,-1,3) .

The position vectors of the points A and B are vec i + 2 vec j + 3 vec k and 2 vec i - vec j - vec k respectively. Find the projection of vec (AB) on the vector vec i + vec j + vec k . Also find the resolved part of vec (AB) in that direction.

A particle is displaced from a position (2 vec i - vec j + vec k) metre to another position (3 vec i + 2 vec j -2 vec k) metre under the action of force (2 vec i + vec j -vec k) N. Work done by the force is

If a force vec(F) = (vec(i) + 2 vec(j)+vec(k)) N acts on a body produces a displacement of vec(S) = (4vec(i)+vec(j)+7 vec(k))m , then the work done is

A point on the line r=2vec i+3vec j+4vec k+t(vec i+vec j+vec k) is

The line of intersection of the planes vec r*(3vec i-vec j+vec k)=1 and vec r*(vec i+4vec j-2vec k)=2, is

NARAYNA-WORK POWER AND ENERGY-NCERT (Based Questions)
  1. Consider the following two statements: A. Linear momentum of a syste...

    Text Solution

    |

  2. A particle move in a straight line with retardation proportional to it...

    Text Solution

    |

  3. A force vec F = (5 vec i+ 3 vec j+ 2 vec k) N is applied over a partic...

    Text Solution

    |

  4. A body of mass m, accelerates uniformly from rest to V(1) in time t(1)...

    Text Solution

    |

  5. A particle is acted upon by a force of constant magnitude which is alw...

    Text Solution

    |

  6. A uniform chain of length 2m is kept on a table such that a length of...

    Text Solution

    |

  7. The block of mass M moving on the frictionless horizontal surface col...

    Text Solution

    |

  8. A particle of mass 0.3 kg subject to a force F=-kx with k=15N//m. What...

    Text Solution

    |

  9. A spherical ball of mass 20kg is stationary at the top of a hill of he...

    Text Solution

    |

  10. A body of mass m is acceleratad uniformaly from rest to a speed v in a...

    Text Solution

    |

  11. A particle of mass 100 g is thrown verically upward with a speed of ...

    Text Solution

    |

  12. The potential energy of a 1 kg particle free to move along the x- axis...

    Text Solution

    |

  13. A mass of M kg is suspended by a weightless string. The horizontal for...

    Text Solution

    |

  14. A ball of mass 0.2 kg is thrown vertically upwards by applying a force...

    Text Solution

    |

  15. A 2kg block slides on a horizontal floor with the a speed of 4m//s it ...

    Text Solution

    |

  16. A particle is projected at 60(@) to the horizontal with a kinetic ene...

    Text Solution

    |

  17. An athlete in the Olympic gamed covers a distance of 100 m in 10 s. Hi...

    Text Solution

    |

  18. The potential energy function for the force between two atoms in a dia...

    Text Solution

    |

  19. Statement-1: Davisson-Germer experiment established the wave nature of...

    Text Solution

    |

  20. When a rubber bandis streched by a distance x , if exerts resuring fop...

    Text Solution

    |