A mass m hangs on a string that is connected to the ceiling. You
pluck the string just above the mass, and a wave pulse travels up
to the ceiling, reflects off the ceiling, and travels back to the
mass. Compare the SPEED of this wave pulse, v1, to
that of a similar wave pulse on the same string if the attached
mass is increased to 5.91m, v2. (Assume that the string does not
stretch in either case and the contribution of the mass of the
string to the tension is negligible.) 
Homework Answers
Concept used:- here we use the concept of wave
motion on a string, and use the relation between the tension on the
string and the wave speed.
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