A Track Star in the Broad Jump Goes into the Jump

question 34

Multiple Choice

A track star in the broad jump goes into the jump at 10 m/s and launches himself at 20° above the horizontal.How long is he in the air before returning to Earth? Note: g = 9.8 m/s².

• A) 0.35 s
• B) 0.42 s
• C) 0.70 s
• D) 0.89 s

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Definitions:

Efficacy

The ability to produce a desired or intended result, often used in the context of the effectiveness of drugs, treatments, or methodologies.

Cognitive Dissonance

A mental struggle caused by holding conflicting beliefs and attitudes at the same time.

Leon Festinger

A social psychologist known for developing the theory of cognitive dissonance.

Theory

An organized collection of thoughts aimed at clarifying something, established on broad principles that are not derived from the phenomenon being clarified.