A Truck Accelerates from Rest at Point a with Constant

question 78

Multiple Choice

A truck accelerates from rest at point A with constant acceleration of magnitude a and, subsequently, passes points B and C as shown in the figure. The distance between points B and C is x, and the time required for the truck to travel from B to C is t. Which expression determines the average speed of the truck between the points B and C?

• A)v² = 2ax
• C)v = xt
• E)v = at

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Definitions:

Recessively Inherited Trait

A genetic characteristic that is expressed in an organism only when two recessive alleles for the trait are inherited, one from each parent.

Chlorophyll

Green photosynthetic pigment of algae and plants that absorbs solar energy; occurs as chlorophyll a and chlorophyll b.

Phenotypes

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

Dominant Allele

Allele that exerts its phenotypic effect in the heterozygote; it masks the expression of the recessive allele.