A series of pulses of amplitude 0.06 m issent down a string that is attached to

Question

A series of pulses of amplitude 0.06 m issent down a string that is attached to a post at one end. Thepulses are reflected at the post and travel back along the stringwithout loss of amplitude. (a) What is the amplitude at a point on thestring where two pulses are crossing, if the string is rigidlyattached to the post?
1 m
(b) What is the amplitude at a point on the string where two pulsesare crossing, if the end at which reflection occurs is free toslide up and down?
2 m
(a) What is the amplitude at a point on thestring where two pulses are crossing, if the string is rigidlyattached to the post?
1 m
(b) What is the amplitude at a point on the string where two pulsesare crossing, if the end at which reflection occurs is free toslide up and down?
2 m

Explanation / Answer

Amplitude of pulse A = 0.29 m (a ) .  the amplitude at a point on the string wheretwo pulses are crossing, if the string is rigidly attached to thepost is               = zero m i.e. 0 m (b). the amplitude at a point on the string where two pulsesare crossing, if the end at which reflection occurs is free toslide up and down = 2 ( A )                     = 2 * 0.29 m                      =0.58 m

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