A Train Starts from Rest and Accelerates Uniformly Until It $24 \mathrm {~m} / \mathrm { s }$

question 135

Multiple Choice

A train starts from rest and accelerates uniformly until it has traveled 2.1 km and acquired a forward velocity of $24 \mathrm {~m} / \mathrm { s }$ The train then moves at a constant velocity of $24 \mathrm {~m} / \mathrm { s }$ for 400 s. The train then slows down uniformly at $0.065 \mathrm {~m} / \mathrm { s } ^ { 2 }$ until it is brought to a halt. The distance traveled by the train while slowing down is closest to

• A)4.4 km.
• B)4.2 km.
• C)4.0 km.
• D)3.8 km.
• E)3.6 km.

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Definitions:

RFLP

Restriction Fragment Length Polymorphism, a technique in molecular biology used to analyze the length of DNA fragments resulting from restriction enzyme cutting, which can vary among individuals.

Kary Mullis

An American biochemist known for his invention of the polymerase chain reaction (PCR) technique, a method used to amplify DNA.

Francis Crick

A British molecular biologist, biophysicist, and neuroscientist, known for co-discovering the structure of DNA.

Southern Blotting

Southern blotting is a molecular biology technique used to detect specific DNA sequences within a DNA sample by transferring DNA from a gel to a membrane and then probing it with a DNA probe.