When a Ball Thrown Straight Upwards Reaches the Very Top

question 47

Multiple Choice

When a ball thrown straight upwards reaches the very top of its path, its acceleration is

• A)zero.
• B)5 m/s².
• C)10 m/s².
• D)none of the above

---

Definitions:

Ordinal

A scale of measurement where numbers represent ordered categories that have a meaningful sequence, but the intervals between the categories are not necessarily equal.

Ratio Scales

Ratio scales are a type of measurement scale that not only have order and equal intervals but also have a true zero point, allowing for the calculation of ratios.

"True" Zero

A point on a scale of measurement that represents a complete absence of the property being measured, as opposed to a mere baseline or reference point.

NOIR

A commonly used acronym in statistics that stands for Nominal, Ordinal, Interval, and Ratio - the four levels of measurement for variables.