A Shell Is Launched from a Cannon and Explodes Mid-Air

question 29

Multiple Choice

A shell is launched from a cannon and explodes mid-air.Which of the following is correct after the explosion?

• A)Since the explosion exerts external forces on the shell, neither its horizontal momentum nor its vertical momentum is conserved.
• B)Since the explosion exerts only internal forces on the shell, both its horizontal and vertical momenta are conserved.
• C)Since the explosion exerts only internal forces on the shell, but gravity is an external force, neither its horizontal momentum nor its vertical momentum is conserved.
• D)Since the explosion exerts only internal forces on the shell, but gravity is an external force, its horizontal momentum is conserved but its vertical momentum is not conserved.
• E)Since the explosion exerts only internal forces on the shell, but gravity is an external force, its vertical momentum is conserved but its horizontal momentum is not conserved.

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Definitions:

Intrusion

An inappropriate or unwanted entry or interference in a situation or personal domain.

Mnemonics

Memory aids, often using patterns of letters, ideas, or associations that facilitate the recall of information.

Reiteration

The act of repeating or restating something for emphasis or clarity, often used in communication or learning processes.

Naturalist Intelligence

The ability to recognize, categorize, and draw upon certain features of the environment.