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

Options

A. zero
B. purely kinetic
C. purely potential
D. particly kinetic and particle potential

Answer

B

Explanation

After 2s ,tubes will overlap each other .Acording to superpossition priciple, the string will not have any distoration and will be straight Hence, here will be no PE the total energy will be kinetic.