A Railroad Car Collides with and Sticks to an Identical

question 36

Multiple Choice

A railroad car collides with and sticks to an identical railroad car that is initially at rest. After the collision, the kinetic energy of the system

• A) is one quarter as much as before.
• B) is the same as before.
• C) is one third as much as before.
• D) is one fourth as much as before.
• E) is half as much as before.

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Definitions:

Erectile Tissue

A type of tissue found in certain parts of the body like the penis and clitoris, which can swell with blood to produce erection.

Dilation

The process of widening, stretching, or expanding, often referring to blood vessels or pupils.

Erectile Tissue

Specialized tissue that can become engorged with blood, leading to an erection, found in the penis, clitoris, and nipples.

Veins

Blood vessels that carry blood toward the heart, typically transporting deoxygenated blood except for the pulmonary and umbilical veins.