Home
Class 11
PHYSICS
Find the area of the rriangle formed by ...

Find the area of the rriangle formed by the tips of the vectors,
` vec a= (2 hat I - hat j+ 3 hat k), vec b= 4 hat I + 3 hat j-hat k`,
` vec C= 3 hat I - hat j + 2 hat k`.

Text Solution

Verified by Experts

Let (ABC) be the triangle formed by the tips of the given vectors. Then
` vec (BA) = vec A- vec b= ( 2 hat i- hat j+ 3 hat k) - ( 4 hat I + 3 hat j-hat k)`
=- 2 hat I - 4 hat j= 4 hat k`
vec (BC) = vec c- vec b = ( 3 hat i-hat j+ 2 hat k) - ( 4 hat i + 3 hat j- hat k)` ltbRgt =- hat i -4 hat j+ 3 hat k`
` | vec BA) xx vec (BC)| = sqrt ((4)^2 +(2)^2+(4)^2)`
` =sqrt ( 16 + 4 + 16 ) =6`
Area of triangle ` ABC = 1/2 | vec (BA) xx (BC)| = 6/2`
`= 3 sq. units.
Promotional Banner

Topper's Solved these Questions

  • KINEMATICS

    PRADEEP|Exercise 4 Problems for practice|45 Videos
  • KINEMATICS

    PRADEEP|Exercise 1 Multiple choice|10 Videos
  • KINEMATICS

    PRADEEP|Exercise 2 Problems for practice|36 Videos
  • GRAVIATION

    PRADEEP|Exercise Assertion-Reason Type Questions|19 Videos
  • LAWS OF MOTION

    PRADEEP|Exercise Assertion- Reason Type Questions|17 Videos

Similar Questions

Explore conceptually related problems

Find the area of a traiangle formed by the tips of the vectors vec c = ( 4 hat i_ 3 hat j + hat k) .

Find the scalr and vector products of two vectors vec a =(3 hat I - 4 hat j + 5 hat k) and vec b = (-2 hat I + hat j- 3 hat k).

underset with a = 2hat i + hat j-3hat k, vec b = -hat i + hat j + 2hat k, vec c = 4hat i + 3hat k

Find the volume of the parallelepiped whose coterminous edges are represented by the vectors: vec a=2 hat i+3 hat j+4 hat k , vec b= hat i+2 hat j- hat k , vec c=3 hat i- hat j+2 hat k vec a=2 hat i+3 hat j+4 hat k , vec b= hat i+2 hat j- hat k , vec c=3 hat i- hat j-2 hat k vec a=11 hat i , vec b=2 hat j- hat k , vec c=13 hat k vec a= hat i+ hat j+ hat k , vec b= hat i- hat j+ hat k , vec c= hat i+2 hat j- hat k

Find vec a.( vec bxx vec c)\ if\ vec a=2 hat i+ hat j+3 hat k ,\ vec b=- hat i+2 hat j+ hat k\ a n d\ vec c=3 hat i+ hat j+2 hat kdot

[vec a,vec b,vec c], when vec a=2hat i-3hat j+4hat k,vec b=hat i+2hat j-hat k and vec c=3hat i-hat j+2hat k

Find the volume of the parallelepiped whose coterminous edges are represented by the vector: vec a=2hat i+3hat j+4hat k,vec b=hat i+hat i+2hat j-hat k,vec c=3hat i-hat j+2hat k

Find the volume of the parallelepiped whose coterminous edges are represented by the vector: vec a=2hat i-3hat j+4hat k,vec b=hat i+hat i+2hat j-hat k,vec c=3hat i-hat j-2hat k

Find the angel between the vectors vec a=hat i-hat j+hat k and vec b=hat i+hat j-hat k

Show that each of the following triads of vectors are coplanar: vec a= hat i+2 hat j- hat k , vec b=3 hat i+2 hat j+7 hat k , vec c=5 hat i-6 hat j+5 hat k vec a=-4 hat i-6 hat j-2 hat k , vec b=- hat i+4 hat j+3 hat k , vec c=8 hat i- hat j+3 hat k hat a= hat i-2 hat j+3 hat k , vec b=-2 hat i+3 hat j-4 hat k , vec c= hat i-3 hat j+5 hat k

PRADEEP-KINEMATICS-3 Problems for practice
  1. Show that vec A = hat I - 5 hat j and vec B= 2 hat I - 10 hat j are...

    Text Solution

    |

  2. Find the component of a vectro vec A = 3 hat I + 2 hat j along the di...

    Text Solution

    |

  3. If vec a and vec b are two non collinerar unit vectors and if | vec ...

    Text Solution

    |

  4. A particle moves from position vector vecr1 = ( 23 hat I + 2 hat j - ...

    Text Solution

    |

  5. A force of 6 hat i+ 7 hat j newton makes a body move on a rough loane...

    Text Solution

    |

  6. Determine the sine of the angle between the vectors ( 3 hat i+ 3hat j+...

    Text Solution

    |

  7. Calculate the area of a paralleogeram whose adjcent sides are given by...

    Text Solution

    |

  8. Find the area of the rriangle formed by the tips of the vectors, ve...

    Text Solution

    |

  9. A verctor of magnitude 100 N is inclined at an angle of 30^@ to anot...

    Text Solution

    |

  10. If | vec A| = 2, | vec B| =5 and | vec A xx vec B | =8 , din the va...

    Text Solution

    |

  11. Dine the unit vector peroendicular to each of the vectors 3 hat i+ ha...

    Text Solution

    |

  12. Fven that vec A xx vec B= vec B xx vec C = vec 0. If vec A. vec B a...

    Text Solution

    |

  13. For any to vectors vec A and vec B, prove that |vec A xx vec B|^2 =...

    Text Solution

    |

  14. Find the area of a traiangle formed by the tips of the vectors vec c ...

    Text Solution

    |

  15. Three vector vec A, vec B and vec C are such that vec A= vec B+ vec ...

    Text Solution

    |

  16. Find the vector sum of N coplanar forces, each of the magnitude F,when...

    Text Solution

    |

  17. A vector vec A when added to the vector vec B = 3. 0 hat i+ 4 hat j y...

    Text Solution

    |

  18. A vector vec A of magniude (A) is turned through an angle theta. Calc...

    Text Solution

    |

  19. Two vector vec P and vec Q act at a point and have a resultant R1. ...

    Text Solution

    |

  20. Two cacar starts together from the asme point and move along two strai...

    Text Solution

    |