Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions

A person moves 30 m north and then 20 m east and finally 30 root 2 m south west what is the displacement from the original position?



Draw diagram according to situation
A person move 30 m in north OA and then 20m in east AB and then 30√2 in south BC,then displacement is given by OC.
to find disp we have to find OC somehow
we will draw a perpendicular from O on BC
RC=30√2 -20
By Pythagoras theorem
OC²= OR²+RC²

0 0 0
But your answer is incorrect
there is mistake in solution,OC^2=400+(30root2-30)^2
OC^2=3100-254.2,OC=root 2845.8

This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
See diagram.

Person starts at A, travels north to B  and the moves to East till C and finally moves along CD in the SOuth West direction.

The movement in the direction CD of length 30√2 m   is equal to a movement of 30 m East and then  30 meters South.  This is easy to show using Pythagoras theorem.

So the displacement of the person is AD , which is 50 meters in the West direction.

2 5 2
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts