A Railroad Car Collides with and Sticks to an Identical

question 12

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

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Definitions:

Microscopic Organisms

Tiny living organisms, such as bacteria, viruses, protozoa, and some algae and fungi, that can only be seen with the aid of a microscope.

Freshwater

Water containing minimal amounts of dissolved salts, found in rivers, lakes, and streams.

Grasslands

Vast open areas where the dominant vegetation consists of grasses, often found in regions with either too much or too little precipitation for forests.

Limited Rain

Situations where an area receives lower than average precipitation over a period, which could lead to drought conditions.