Pr4. A vertical spring of stiffness k is atta- ched to the top of a block of mass m. At t = 0 the top end of the initially unstretched spring is started to be pulled upwards with constant velo- city v, as it can be seen in the figure. When does the speed of the body become maximal first, and what is this maximal value?

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Pr4. A vertical spring of stiffness k is atta-
ched to the top of a block of mass m. At t = 0
the top end of the initially unstretched spring is
started to be pulled upwards with constant velo-
city v, as it can be seen in the figure. When does
the speed of the body become maximal first, and
what is this maximal value?
Transcribed Image Text:Pr4. A vertical spring of stiffness k is atta- ched to the top of a block of mass m. At t = 0 the top end of the initially unstretched spring is started to be pulled upwards with constant velo- city v, as it can be seen in the figure. When does the speed of the body become maximal first, and what is this maximal value?
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