- #36
erobz
Gold Member
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- 1,679
Not to derail this approach with the forces, but if indeed at the instant ##m_2## begins to accelerate, ##m_5##'s velocity is given by:
$$ v = 2 \sqrt{x} \left[ \frac{ \sqrt{m}}{s} \right] $$
As is stated in the problem, then we can skip all the all the tension issues (with the spring and the string -not that is shouldn't be understood by the OP) and just use conservation of energy (only involving ##m_5##).
Are any of the other helpers concerned about this seeming "excess" of information, or am I missing something? The math doesn't jive. Even if I write the force equation and apply ## v \frac{dv}{dx}## I find an ##x## when multiplied by ##k## that does not yield ##20 ~N##...
$$ v = 2 \sqrt{x} \left[ \frac{ \sqrt{m}}{s} \right] $$
As is stated in the problem, then we can skip all the all the tension issues (with the spring and the string -not that is shouldn't be understood by the OP) and just use conservation of energy (only involving ##m_5##).
Are any of the other helpers concerned about this seeming "excess" of information, or am I missing something? The math doesn't jive. Even if I write the force equation and apply ## v \frac{dv}{dx}## I find an ##x## when multiplied by ##k## that does not yield ##20 ~N##...
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