Question:
In the adjoining figure, two pulses in a stretched string are shown. If initially their centres are 8 cm apart and they are moving towards each other, with speed of 2 cm/s, then total energy of the pulses after 2 s will be
In the adjoining figure, two pulses in a stretched string are shown. If initially their centres are 8 cm apart and they are moving towards each other, with speed of 2 cm/s, then total energy of the pulses after 2 s will be
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When two pulses in a string meet, the total energy is conserved and is purely kinetic if there is no reflection.
Updated On: Jan 6, 2026
- Zero
- Purely kinetic
- Purely potential
- Partly kinetic and partly potential
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The Correct Option is B
Solution and Explanation
Step 1: Analyzing the motion of the pulses.
Since the pulses are moving towards each other, they will collide after 2 seconds. The total energy of the system will be purely kinetic at that point.
Step 2: Conclusion.
The total energy of the pulses after 2 seconds will be purely kinetic, which corresponds to option (2).
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