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!

Homework Help: Vectors and scalars question

  1. Sep 7, 2011 #1
    Question:

    Solve the following vector equations mathematically:

    a) a + b
    b) c- d
    c) 2a -1/2b
    d) a + c +b

    Given:

    a = 10m[R]
    b = 20m[L]
    c = 10m
    d = 5m[D]

    Solution:

    a) 10m [R] - 20m [L] = 10m [L]

    b) 10m - 5m [D] = 5m

    c) 20m [R] - 10m [L] = 10m [R]

    d) a + c +b
    = 10m[R] + 10m +{-20m [L]}
    = ?

    Are my answers correct and how do you solve question d.
     
  2. jcsd
  3. Sep 7, 2011 #2
    B is wrong. If it was c+d you would minus them but you have the opposite: c-d so you add them.
    Same with C


    D) Add the horizontals first A+B (answer to part a). Then add the 10 m to the horizontal. The answer (resultant) is the hypotenuse, construct a right triangle.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook




Loading...