A Track Star in the Broad Jump Goes into the Jump

question 72

Multiple Choice

A track star in the broad jump goes into the jump at 12 m/s and launches himself at 20° above the horizontal.How long is he in the air before returning to Earth? (g = 9.8 m/s²)
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• A) 0.42 s
• B) 0.84 s
• C) 1.68 s
• D) 2.3 s
• E) 0.89 s

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Definitions:

Atmospheric Layer

A layer in the Earth's atmosphere characterized by specific temperature and pressure conditions, such as the stratosphere or troposphere.

Earth's Air

The mixture of gases surrounding the planet, known as the atmosphere, which is crucial for supporting life by providing oxygen and protecting against solar radiation.

Troposphere

The lowest layer of Earth's atmosphere, where weather phenomena like rain, snow, and storms occur.

Atmospheric Boundary

The transitional layer of the atmosphere closest to the Earth's surface where the majority of weather phenomena take place.