A Particle Moves in the Xy Plane in a Circle

question 36

Multiple Choice

A particle moves in the xy plane in a circle centered on the origin.At a certain instant the velocity and acceleration of the particle are 4.0
M/s and (−3.0
− 2) 0
) m/s².What are the x and y coordinates of the particle at this moment?

• A)x = −4.4 m,y = 0
• B)x = +5.3 m,y = 0
• C)x = −5.3 m,y = 0
• D)x = +4.4 m,y = 0
• E)x = −1.8 m,y = 0

---

Definitions:

Coefficient Alpha

A reliability coefficient that measures the internal consistency of a test or scale; it is commonly used in psychometrics.

Reliability

The reliability of an evaluation tool in generating steady and unchanging outcomes over various periods.

Spearman-Brown Formula

A mathematical formula that can be used with split-half or odd-even reliability estimates to increase the accuracy, which is impaired because of the shortening (splitting in half) of the test.

Reliability Estimate

A measure of the consistency of a psychological test or assessment tool across time, items, and raters, indicating its stability and dependability.