The Hills Motorway in Sydney Has a Number of Lanes

question 22

Multiple Choice

The Hills Motorway in Sydney has a number of lanes for traffic. For traffic going in one direction, the radius for the inside of the curve is half the radius for the outside. One car, car A, travels on the inside while another car of equal mass, car B, travels at equal speed on the outside of the curve. Which statement about resultant forces on the cars is correct?

• A)The force on A is half the force on B.
• B)The force on B is half the force on A.
• C)The force on A is four times the force on B.
• D)The force on B is four times the force on A.
• E)There is no net resultant force on either as long as they stay on the road while turning.

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Definitions:

Pupil Diameter

The size of the opening in the center of the iris of the eye, which regulates the amount of light that enters the eye.

Sphincter Pupillae

Circular smooth muscle fibers of the iris’s diaphragm that constrict the pupil of the eye.

Ciliary Muscles

Ring-shaped muscles in the eye that change the shape of the lens to focus light on the retina, enabling the eye to adapt its vision for close or distant objects.

Dilator Pupillae

Radial smooth muscle cells of the iris diaphragm that cause the pupil of the eye to dilate.