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Homework answers / question archive / 1) The speed of a transverse wave on a string is 155 m/s when the string tension is 120 N
1) The speed of a transverse wave on a string is 155 m/s when the string tension is 120 N. To what value must the tension be changed to raise the wave speed to 180 m/s?
2) The speed of a transverse wave on a string is 140 m/s when the string tension is 140 N. To what value must the tension be changed to raise the wave speed to 200 m/s?
3) The speed of a transverse wave on a string is 170m/s when thestring tension is 120N. To raise the wave speed to 180m/s,
tension must be changed to?????
Answer:
2.
vα√T
Therefore,
T2/T1=(v2/v1)2
T2=T1(v2/v1)2=140*(200/140)2=285.7N
3.
speed =v=√T/m
where m is linear density
from this vα√T
now
180/170=√T2/T1
hence T2/T1=1.121
T2=120*1.121=134.53N
tension must be changed to 134.53N
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