1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Simple acceleration, force, and mass question

  1. Oct 1, 2013 #1
    1. The problem statement, all variables and given/known data

    A 30 tonne jumbo jet accelerates down the runway at 4 m/s².What must be the thrust on
    each of its four engines?


    2. Relevant equations

    Acceleration = force/mass

    the formula gives acceleration in m/s², provided that the force is in N and the mass is in kg


    3. The attempt at a solution

    This is what I attempted (Not sure if it's correct)

    Firstly, we need to convert the tonne into kg. Therefore, 30 tonne = 30000kg

    Step 1: Acceleration = force/mass
    Step 2 (embedding the digits): 4 = f/30000
    Step 3 (multiplying both sides by 30000) 4 x 30000 = f/30000 (30000)
    Step 4 (Simplifying) 120000 = F

    I found that my answer is 120000 Newtons (N) is the total thrust but because there is 4 engines, we must divide the force by 4, which will amount to 30000 newtons on each engine.

    ^that is my reasoning for this question which I suspect is probably flawed in one way or another for a couple of reasons. I'd like your help in knowing if I did something incorrect and if so, I'd like your help in correcting it.
     
  2. jcsd
  3. Oct 1, 2013 #2

    Dick

    User Avatar
    Science Advisor
    Homework Helper

    I think it's perfectly correct.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Simple acceleration, force, and mass question
Loading...