A Machine Gun Is Attached to a Railroad Flatcar That

question 24

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:

Medications

Substances used to treat or prevent disease, alleviate symptoms, or modify physiological processes for beneficial purposes.

Systolic Contraction

The phase of the heart cycle during which the heart muscle contracts and pumps blood from the chambers into the arteries.

Brachial

Pertaining to the arm, specifically the area of the upper limb between the shoulder and the elbow.

Rectal Temperature

A measurement of body temperature taken from the rectum, which provides a core reading that is closely aligned with the body's true temperature.