As a Car Drives with Its Tires Rolling Freely Without

question 87

Multiple Choice

As a car drives with its tires rolling freely without any slippage, the type of friction acting between the tires and the road is

• A) static friction.
• B) kinetic friction.
• C) a combination of static and kinetic friction.
• D) neither static nor kinetic friction, but some other type of friction.
• E) It is impossible to tell what type of friction acts in this situation.

---

Definitions:

Ectoderm

The outermost layer of cells or tissue of an embryo in early development, giving rise to the outer layer of skin, nails, hair, and nervous system.

Epiblast

A layer of cells in the early embryo from which all the various tissues and organs of the body will eventually develop.

Neural Plate

An early embryonic structure that gives rise to the central nervous system, including the brain and spinal cord, through the process of neurulation.

Notochord

A flexible rod made of a material similar to cartilage that provides support in the embryonic stages of all chordates.