Two pulses in a stretched string whose centers are initiall…

Biology NEET Full Syllabus Mock Test 180 Questions New Syllabus Mock Test - 15 PCB Single Correct MCQ

Published on: August 11, 2026

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

zero

purely kinetic

purely potential

partly kinetic and partly potential

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The correct answer is:

After two seconds both the pulses will move 4 cm towards each other. So by their superposition, the resultant displacement at every point will be zero therefore total energy will be purely in the form of kinetic. Half of the particles will be moving upwards and half downwards.

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