RAJASTHAN ­ PET Rajasthan PET Solved Paper-2003

  • question_answer
    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 2s, the total energy of the pulses will be

    A)  zero

    B)  purely kinetic

    C)  purely potential

    D)  partly kinetic and partly potential

    Correct Answer: B

    Solution :

     After\[2s,\]the beats will be superposed completely each other. By this the string gets straight and there will be no potential energy in the string. It has only kinetic energy.


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