What would rocket ship velocity be
A rocket ship is 80.0 m in length if measured before leaving the launching pad. What would its velocity be when a ground observer measured its length as 60.0 m while it is in flight? (c = 3.00 x 10^8 m/s)
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The period of an oscillating weight on the spring in an inertial frame of reference is around 0.80s. Find out what would be its speed when it was to move by an observer who measures its period as 1.2 second? (c = 3.00 x 10^8 m/s)
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