It's been a week since car hauling company Jack Cooper abruptly shuttered operations after losing GM and Ford business. Its workers want answers.

The dominoes started to topple when automaker Ford decided in January to end its relationship with Jack Cooper, bringing the curtain down on an approximately 40-year relationship.

Free body diagrams do not need to be drawn to scale but it can sometimes be useful if they are. It is important to label each arrow to show the magnitude of the force it represents. The type of ...