A person walked 100 meters towards north and then took a turn of 40° to his left and walked another 100 meters,what is his total displacement?
2 Answers
His total displacement,
So,we can calculate the displacement as,
Explanation:
Using the cosine rule. Let
#b=100# # c=100#
The displacement is
The cosine rule for finding a side is
Break the formula down into sections:
So
Therefore, we know that
We now must find the square root to find what
We can round this to