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Two pulse in a stretched string whose ce...

Two pulse in a stretched string whose centers are initially `8cm` apart are moving towards each other as shown in the figure. The speed of each pulse is `2cm//s`. After `2seconds`, the total energy of the pulse will be

A

zero

B

purely kinetic

C

purely potential

D

party kinetic and partly potential

Text Solution

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The correct Answer is:
B
After ` 2s` , the two pulses will nullify each other . String now becomes straight , there will be no deformation in the string . In such a situation , the string will not have potential energy at any point . The whole nergy will be kinetic.
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