Question

A drunken sailor stumbles 550 meters north, 500 meters northeast, then 450 meters northwest. What is the total displacement and the angle of the displacement

Answer 1

Resultant displacement = 1222.3 m

Angle is 88.3 degree from +X axis.

Step-by-step explanation:

A = 550 m north

B = 500 m north east

C = 450 m north west

Write in the vector form

A = 550 j

B = 500 (cos 45 i + sin 45 j ) = 353.6 i + 353.6 j

C = 450 ( - cos 45 i + sin 45 j ) = - 318.2 i + 318.2 j

Net displacement is given by

R = (353.6 - 318.2) i + (550 + 353.6 + 318.2) j

R = 35.4 i + 1221.8 j

The magnitude is

`R = \sqrt{35.4^(2)+1221.8^(2)}R = 1222.3 m`

The direction is given by

`tan\theta =(1221.8)/(35.4)\\\\\theta = 88.3^(o)`