Two pulses in a stretched string whose centres are initially 8 cm apart are moving towards each other as
shown in fig. (a). The speed of each pulse is 2 cm/s. After 2 second, the total energy of the pulses will be
After 2 second, the two pulses will meet in mutually opposite phase and hence the amplitude of resultant wave will be zero. So, the total energy will be purely kinetic.