Question

HELP!!

You walk 130 m E and then turn and walk another 43m [E 28 degree S] what is the total displacement?

Answer 1

Total displacement 155 m

Step-by-step explanation:

From the question, the formula to apply will be that of cosine rule where:

`c=√(a^2+b^2-2ab*cosC)`

where

a= 43 m , b=130m and c =? , <C=28° + 90° =118°

Substituting values in the equation as;

`c=√(43^2+130^2-2*43*130*cos118)`

`c=√(1849+16900-11180*-0.46947) \\\\c=√(1849+16900+5249) \\\\c=√(23998) \\\\\\c=155m`