- Fred:
**F**to the East_{fred} - Betsy:
**340 N**to the North - Joe:
**400 N**at an angle**theta**South of West

The net result is that the tire accelerates
slowly to the North,
at **a = 1.0 m/s ^{2}**.

What is the angle **theta**?

How hard is Fred pulling?

force x y -------------------------------- | | | | | | | | | | | | | | | | -------------------------------- total | | -------------------------------- x y -------------------------------- accel | | | | --------------------------------

*If you have time ... *

The kids take a break, then start pulling again. This time, things are a little different:

- Betsy still pulls North at
**340 N** - Fred still pulls East, but with a force of
**250 N** - Joe pulls with a new force
**F**at a different angle_{Joe}**theta** - the tire does accelerate North at
**1 m/s^2**again

Can you figure out the magnitude and direction of **F _{Joe}**?