# Charged pion. GONE!

Classical Mechanics Level 5

If a charged pion that decays in $${ 10 }^{ -8 }$$ seconds in its own rest frame is to travel $$30m$$ in the laboratory before decaying, what must the pion's speed be at least? SJPO 2010, Q42

Use Special Relativity to solve this.
Type your answer in $$m{ s }^{ -1 }$$.

This question is part of my set SJPO Practice Questions

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