At One Instant an Object in Free Fall Is Moving

question 22

Multiple Choice

At one instant an object in free fall is moving downward at 50 meters per second. One second later its speed should be about

• A) 100 m/s.
• B) 55 m/s.
• C) 50 m/s.
• D) 25 m/s.
• E) 60 m/s.

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Definitions:

Ordinal

Pertaining to a type of data or scale that expresses order or ranking among categories without implying precise measurements.

Friedman Test

A non-parametric statistical test for comparing more than two related groups, assessing differences across multiple test attempts.

Rejection Region

In statistical hypothesis testing, it is the range of values for which the null hypothesis is considered improbable enough to be rejected.

Significance Level

The threshold below which a null hypothesis is rejected in a statistical test, often denoted by alpha (α) and commonly set at 0.05 or 5%.