A Train with a Constant Velocity of +28

question 21

Multiple Choice

A train with a constant velocity of +28.6 m/s approaches a small town . The operator applies the brake, reducing the train's velocity to +11.4 m/s. If the average acceleration of the train during braking is -1.35 m/s², for what elapsed time does the operator apply the brake?

• A)8.44 s
• B)12.7 s
• C)3.38 s
• D)5.92 s
• E)10.4 s

---

Definitions:

Dominant

A term used in genetics to describe an allele that expresses its phenotypic effect even in the presence of a recessive allele.

Horned Cow

A breed or individual of cattle that has distinctive horns, used for defense, display, and other functions.

Homozygous Dominant

A genetic condition where an individual possesses two identical alleles for a trait on both homologous chromosomes, and the trait is dominant.

Phenotypes

The observable physical or biochemical characteristics of an organism, as determined by both genetic makeup and environmental influences.