The Velocity of a Particle Moving Along the X Axis

question 45

Multiple Choice

The velocity of a particle moving along the x axis changes from v_i to v_f.For which values of v_i and v_f is the total work done on the particle positive?

• A)v_i = 5m/s, v_f = 2m/s
• B)v_i = 5m/s, v_f = -2m/s
• C)v_i = -5m/s, v_f = -2m/s
• D)v_i = -5m/s, v_f = 2m/s
• E)v_i = -2m/s, v_f = -5m/s

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Definitions:

Repressor Gene

A gene that encodes a protein which can bind to an operator or promoter sequences to prevent transcription of a certain gene.

Promoter

A region of DNA that initiates transcription of a particular gene, playing a crucial role in regulating gene expression.

Operator

A segment of DNA to which a repressor protein binds, regulating the expression of genes by blocking the attachment of RNA polymerase to the promoter region.

RNA Polymerase

An enzyme that synthesizes RNA from a DNA template, essential for the transcription phase of protein synthesis.