An Auto Moves at a Steady 50 Mph Down a Straight

question 43

Multiple Choice

An auto moves at a steady 50 mph down a straight level road. Which of the following is the forward drive force on the auto?

• A) The backward push by the engine on the car.
• B) The backward push by the drive tires on the road.
• C) The drive force is actually zero in this example, because the auto is moving at a constant speed in a straight line.
• D) The forward push by the road on the tires.
• E) The forward push by the engine on the car.

---

Definitions:

Curvilinear Relationship

A relationship between two variables where the change in one variable is not constant with respect to the change in another.

Nonlinear Relationship

A relationship between variables where the change in one variable does not result in a proportional change in the other variable.

Nonmonotonic

A description of relationships where the direction of change is not consistent across the range of variables.

Curvilinear Relationship

A relationship between two variables in which the change in one variable does not result in a linear change in the other variable.