- #1
kaspis245
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Homework Statement
A mass ##m## body is attached to the spring and rests on the board so the spring is not stretched. The board starts to move with an acceleration ##a##. How much does the spring stretch at the moment when the board separate from the body?
Homework Equations
Newton's Laws of Motion
The Attempt at a Solution
Here is my drawing:
I think that the board will separate from the body when ##kx=m_1a##, where ##m_1## is the mass of the board. I can't use ##m_1## since it is not given in the problem but I can't think a way to replace it.
Is my reasoning correct and how can I replace ##m_1##?