The Position of a Particle Moving Along the Y Axis $y=0.20 \mathrm{~m}+\left(8.0 \frac{\mathrm{~m}}{\mathrm{~s}}\right) t-\left(10 \frac{\mathrm{~m}}{\mathrm{~s}^{2}}\right) \mathrm{t}^{2}$

question 2

Multiple Choice

The position of a particle moving along the y axis has a position given by: $y=0.20 \mathrm{~m}+\left(8.0 \frac{\mathrm{~m}}{\mathrm{~s}}\right) t-\left(10 \frac{\mathrm{~m}}{\mathrm{~s}^{2}}\right) \mathrm{t}^{2}$ Is there any time interval during which the particle is not moving?

• A)Yes, from 0.60 s to 1.00 s.
• B)Yes, from 0.795 s to 0.805 s.
• C)Yes, at the time t = 0.80 s.
• D)No, the velocity is never zero.
• E)No, an instant is not the same as a time interval.

---

Definitions:

Sample Size

The number of observations or subjects used in a study or experiment, critical for determining the study's reliability and representativeness.

Population Deviation

Refers to the measure of dispersion from the mean in a population data set, indicating the average distance from the mean for all population values.

Population Mean

The average of a set of values or measurements in the entire population.

Critical Value

A specific position in the test distribution used for comparison with the test statistic in order to make a decision about rejecting the null hypothesis.