Solve the Problem $t$ , the Position of a Body Moving Along the S-Axis

question 426

Multiple Choice

Solve the problem.
-At time $t$ , the position of a body moving along the s-axis is $s = t ^ { 3 } - 21 t ^ { 2 } + 120 t m$ . Find the body's acceleration each time the velocity is zero.

• A) \(a ( 10 ) = 0 \mathrm {~m} / \mathrm { sec } ^ { 2 } , a ( 4 ) = 0 \mathrm {~m} / \mathrm { sec } ^ { 2 }\)
• B) \(a ( 10 ) = - 18 \mathrm {~m} / \mathrm { sec } ^ { 2 } , a ( 4 ) = 18 \mathrm {~m} / \mathrm { sec } ^ { 2 }\)
• C) \(a ( 20 ) = 120 \mathrm {~m} / \mathrm { sec } ^ { 2 } , a ( 8 ) = 20 \mathrm {~m} / \mathrm { sec } ^ { 2 }\)
• D) \(a ( 10 ) = 18 \mathrm {~m} / \mathrm { sec } ^ { 2 } , a ( 4 ) = - 18 \mathrm {~m} / \mathrm { sec } ^ { 2 }\)

---

Definitions:

Effect Size

A quantitative measure of the magnitude of a phenomenon, indicating the size of an effect or difference in a statistical model.

Effect Size Formula

A computational method used to quantify the strength of the relationship between two variables or the magnitude of difference between groups.

Population Standard Deviation

A measure of the amount of variation or dispersion of a set of values in a population.

Sample Size

The number of observations or entities considered in a statistical sample.