A Machine Gun Is Attached to a Railroad Flatcar That

question 1

Multiple Choice

A machine gun is attached to a railroad flatcar that rolls with negligible friction. If the railroad car has a mass of 6.25 * 10⁴ kg, how many bullets of mass 25 g would have to be fired at 250 m/s off the back to give the railroad car a forward velocity of 0.3 m/s?

• A) 400
• B) 2000
• C) 3000
• D) 5000

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Definitions:

Growth Stunting

A condition characterized by inadequate growth in children, typically due to chronic malnutrition or repeated infections.

Marasmus

A severe form of malnutrition caused by a significant deficiency in calories and protein, leading to substantial weight loss and muscle wasting.

Kwashiorkor

A form of severe malnutrition caused by inadequate protein intake, characterized by swelling, hair discoloration, and liver damage.

Corpus Callosum

A large band of neural fibers connecting the two hemispheres of the brain, facilitating communication between them.