Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

ashna

  • 2 years ago

A motor boat is rising towards N at 25 Km/hr and the water current in that region is 10 km /hr in the direction of 60° east of south . Find the resultant velocity of the boat .

  • This Question is Closed
  1. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    @waterineyes you know this sum ?

  2. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    I don't...

  3. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    you know some one in open study who can help me ?

  4. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    I think @sauravshakya can help you here..

  5. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    i sent him a msg .. no reply :/

  6. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    But he is online.. Let me try..

  7. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    okay !

  8. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Which chapter is this ??

  9. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    motion in a plane.

  10. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Yeah I think you will get help here..

  11. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    thanks waterineyes :)

  12. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    @rsadhvika do you know how to solve this ??

  13. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1344771481322:dw|

  14. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Here A and B are the vectors.. A is representing the boat and B is representing Water...

  15. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    okay .. understood !

  16. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Now We have to find Resultant first.. For that we first make our figure look like parallelogram..

  17. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    okay

  18. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Wait I draw the figure more clearly for you..

  19. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    its okay .. i can understand :)

  20. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1344771854805:dw|

  21. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1344771963782:dw|

  22. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    is that the parellelogram we need ?

  23. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Now make it look like parallelogram: |dw:1344771989674:dw| Getting this ??

  24. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yeah got it !

  25. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Now can you draw diagonal of the parallelogram ??

  26. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1344772085729:dw|

  27. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    wrong ?

  28. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Great.. This is the resultant of A and B vector..

  29. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    okay :)

  30. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    what is theta here ?

  31. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    You must mention the direction also..

  32. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    what direction ? direction of vector ?

  33. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1344772213529:dw|

  34. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    okay !

  35. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Since boat has higher velocity then boat will go in upward direction.. Getting ??

  36. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yeah ..and if lower velocity , down ?

  37. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Yeah that will depend upon velocity of water..

  38. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    okay !

  39. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Have you studied about the formula: \[Resultant (R)= \sqrt{A^2 + B^2 + 2AB \cos(\theta)}\]

  40. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yeah i have !

  41. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Here A is just velocity of boat that is : 25 and B is just velocity of water that is : 10 But you have to find theta first.. Right ??

  42. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yeah .. how do we find theta ?

  43. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Theta is basically angle between the two vectors A and B.. Here what is the angle between A and B.. Can you locate on the drawing ??

  44. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1344772636899:dw|

  45. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    i don't know !

  46. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1344772698399:dw|

  47. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    That is the angle between A and the resultant.. We have to locate angle between A and B..

  48. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Don't worry @ashna I draw it..

  49. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    okay !

  50. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1344772809427:dw| Getting?? That is the angle between A and B..

  51. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yeah !

  52. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Can you find its value ??

  53. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Make a try..

  54. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    180 - 60 ?

  55. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    120 ?

  56. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Great.. A medal for you..

  57. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    :)

  58. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Can you tell cos(120) = ??

  59. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yea .. cos (90+30) - sin 30 - 1/2 correct ?

  60. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    I wish I could give you more medals.. Yes that is very correct.. Now can you use that formula ??

  61. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    okay i'll try !

  62. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    There is no need to go fast.. I can wait.. Just take your time and post your answer here..

  63. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    I think this site is going to be down soon..

  64. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    If my reply does not come @ashna then don't worry . Just post the answer or doubt here I will check it later on..

  65. waterineyes
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    What happened @ashna

  66. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    okay .. now i can type .. some net problem i guess.. sorry for the delay .. i got square root 475 !

  67. ashna
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    91.7945

  68. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Ask a Question
Find more explanations on OpenStudy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.