Average Velocity: Solve 1.00*10É2(N), 1.50*10É2m(S), 5.0*10É1(E) @ 40 m/s

[soulja101]

Homework Statement

A person runs 1.00*10É2m(N), 1.50*10É2m(S) and finaly 5.0*10É1(E). If the average speed is 40m/s, what is the average velocity.

Homework Equations

The Attempt at a Solution

1.00*10É2(N)
1.50*10É2m(S)
5.0*10É1(E)

you start out by adding the north and south vectors which gives you 50m(S) i don't know wat to do after that

 

[Integral]

Add the last displacement vector. Then find the magnitude, this is the total displacement.

Using the average speed you can find the time spend on each leg. Now use the total time and the final displacement to get an average velocity.

 

[soulja101]

magnitude?

How do i find the magnitude?