Home
Class 11
PHYSICS
A force (3hati+2hatj) N displaces an obj...

A force `(3hati+2hatj)` N displaces an object through a distance `(2hati-3hatj)` m. The work done is :

A

zero

B

12 J

C

5 J

D

13 J

Text Solution

Verified by Experts

The correct Answer is:
1

W `= vecF*vecS= (3hati +2hatj)*(2hati-3hatj)= 6-6=0`
Promotional Banner

Topper's Solved these Questions

  • BASIC MATHEMATICS USED IN PHYSICS &VECTORS

    ALLEN|Exercise CROSS PRODUCT|15 Videos
  • BASIC MATHEMATICS USED IN PHYSICS &VECTORS

    ALLEN|Exercise EXERCISE-II AIPMT/NEET & AIIMS (2006- 2018)|6 Videos
  • BASIC MATHEMATICS USED IN PHYSICS &VECTORS

    ALLEN|Exercise RESOLUTION OF VECTOR|8 Videos
  • CENTRE OF MASS

    ALLEN|Exercise EXERCISE-V B|19 Videos

Similar Questions

Explore conceptually related problems

If a force of (8.0 hati+2.0 hatj+3 hatk)N displaces a body through a distance of (6.0 hati-3 .0 hatj -9 hatk) m . The work done will be

Due to a force of (6hati+2hatj)N the displacement of a body is (3hati-hatj)m , then the work done is

A force (3hati+4hatj) newton acts on a boby and displaces it by (3hati+4hatj) metre. The work done by the force is

A force of (3 hati + 4 hatj) Newton acts on a body and it by (3 hati + 4 hatj)m . The work done by the force is

A force vecF= (3hati+4hatj) N acts on a body and displaces it by vecS= (3hati+4haj)m . The work done (W= vecF*vecS ) by the force is :

A constant force of (2hati+3hatj+5hatk) N produces a displacement of (3hati+2hatj+2hatk) m. Then work done is

When a force vecF = (6hati - 2hatj) N displaces a particle by vecS = (2hati - 3hatj) m, then average power is 0.4 w . The time of action of force is

A force vecF=(5hati+4hatj)N acts on a body and produces a displacement vecS=(6hati-5hatj+3hatk) m. The work done will be

A force F=(2hati-hatj+4hatk)N displaces a particle upto d=(3hati+2hatj+hat k)m. Work done by the force is

ALLEN-BASIC MATHEMATICS USED IN PHYSICS &VECTORS -DOT PRODUCT
  1. What is the angle between vecA and the resultant of (vecA + hatB) and...

    Text Solution

    |

  2. If ahati +bhatj is a unit vector and it iws perpendicular to hati +hat...

    Text Solution

    |

  3. Given that A=B. What is the angle between (vecA+vecB) and (vecA-vecB) ...

    Text Solution

    |

  4. The vector sum of two forces is perpendicular to their vector differen...

    Text Solution

    |

  5. A magnitude of vector vecA,vecB and vecC are respectively 12, 5 and 13...

    Text Solution

    |

  6. If vectors vecP, vecQ and vecR have magnitudes 5, 12 and 13 units and ...

    Text Solution

    |

  7. A vector perpendicular to (4hati-3hatj) may be :

    Text Solution

    |

  8. A force (3hati+2hatj) N displaces an object through a distance (2hati-...

    Text Solution

    |

  9. If vecP.vecQ=PQ then angle between vecP and vecQ is

    Text Solution

    |

  10. The resultant of vecA and vecB is perpendicular to vecA. What is the a...

    Text Solution

    |

  11. What is the component of (3hati+4hatj) along (hati+hatj) ?

    Text Solution

    |

  12. The vector vecB= 5hati+2hatj-Shatk is perpendicular to the vector vec...

    Text Solution

    |

  13. What is the projection of vecA on vecB ?

    Text Solution

    |

  14. The angle between the vectors (hati+hatj) and (hatj+hatk) is

    Text Solution

    |

  15. The angles between the two vectors vecA=3hati+4hatj+5hatk and vecB=3ha...

    Text Solution

    |

  16. Let vec(A)=hat(i)A cos theta+hat(j)A sin theta, be any vector. Another...

    Text Solution

    |

  17. The vector vecP=ahati+ahatj+3hatj and vecQ=ahati-2hatj-hatk, are perpe...

    Text Solution

    |

  18. A force vecF= (3hati+4hatj) N acts on a body and displaces it by vecS=...

    Text Solution

    |

  19. The vector projection of a vector 3hat(i)+4hat(k) on y-axis is

    Text Solution

    |

  20. If a vector (2hati+3hatj+ 8hatk) is perpendicular to the vector (4hatj...

    Text Solution

    |