A Brass Ball Is Shot Vertically Upward from the Surface

question 57

Multiple Choice

A brass ball is shot vertically upward from the surface of an atmosphere-free planet with an initial speed of 20.0 m/s. One second later, the ball has an instantaneous velocity in the upward direction of 15.0 m/s.
-How long is the ball in the air when it returns to its original position?

• A)4.0 s
• B)4.6 s
• C)8.0 s
• D)9.2 s
• E)16 s

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Definitions:

American Indians

Indigenous peoples of the United States, including both Native American tribes and Alaska Natives.

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Work involving the creation, maintenance, and sharing of cultural identities and practices, often undervalued in mainstream economies.

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A female individual of Chinese descent who is American by birth or naturalization, embodying experiences shaped by both her ethnic heritage and national identity.