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Two pulses in a stretched string whose c...

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

A

Zero

B

Purely kinetic

C

Purely potential

D

Partly kinetic and partly potential

Text Solution

Verified by Experts

The correct Answer is:
B
After t = 2sec, pulses will overlap completely Resultant amplitude = 0
Hence, potential energy = 0 and entire energy must be kinetic energy. String will be straight.
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