Turn on thread page Beta
    • Thread Starter
    Offline

    2
    ReputationRep:
    I worked out the following answer but not sure if the method I have used is correct. The question is that a boat is being pulled by tugs, one at 15 degrees with a force of 18000 N and the other with a force of 30000 N at an unknown angle and I have to work out the angle required to keep the boat travelling in a straight line.

    I worked out the horizontal component of of the 18000 N and just guessed that the horinzontal force (which would actually look vertical on a diagram) would also need to be the same so I just substituted the value with the 30000 N into a trigonomic equation to get an angle. Could someone just please that this is the right method to use?
    • Study Helper
    Offline

    15
    Study Helper
    (Original post by Unknown?)

    I worked out the horizontal component of of the 18000 N and just guessed that the horinzontal force (which would actually look vertical on a diagram) would also need to be the same so I just substituted the value with the 30000 N into a trigonomic equation to get an angle. Could someone just please that this is the right method to use?
    Sounds about right, if you meant:

    In order for the boat to continue in a straight line the sum of the forces acting perpendicular to that line must be zero.

    So for the 18000 N force, this will be 18000 Sin 15.

    For the 30000 N, this will be 30000 Sin a.

    These two will be equal.
    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by ghostwalker)
    Sounds about right, if you meant:

    In order for the boat to continue in a straight line the sum of the forces acting perpendicular to that line must be zero.

    So for the 18000 N force, this will be 18000 Sin 15.

    For the 30000 N, this will be 30000 Sin a.

    These two will be equal.
    Thanks a lot that sounds right.
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: October 12, 2009

University open days

  • Heriot-Watt University
    School of Textiles and Design Undergraduate
    Fri, 16 Nov '18
  • University of Roehampton
    All departments Undergraduate
    Sat, 17 Nov '18
  • Edge Hill University
    Faculty of Health and Social Care Undergraduate
    Sat, 17 Nov '18
Poll
Have you ever experienced bullying?
Useful resources

Make your revision easier

Maths

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

Equations

How to use LaTex

Writing equations the easy way

Equations

Best calculators for A level Maths

Tips on which model to get

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.