A Mass Is Bouncing on the End of a Spring

question 93

Multiple Choice

A mass is bouncing on the end of a spring with a period T when measured by a ground observer.What would the period of oscillation be (as measured by the same observer) if the mass and spring were moving past the ground observer at a speed of 0.9c?

• A)5.3 T
• B)0.40 T
• C)3.2 T
• D)2.3 T
• E)​1.1 T

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