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# Work and Speed: Factor of Change

APPH12-UM9EW0

In part of an experiment, a certain force acts to do work on an object, and the object's speed increases from rest to a final speed $v$. In the second part of the experiment, 4 times as much work is done on the same object, again speeding it up from rest.

What is the object's final speed during the second part of the experiment?

A

${ v }/{ 2 }$

B

$v$

C

$2v$

D

$4v$