question_answer

Consider two rectangular wave pulses each of which is moving towards the other with a speed of \[1\,mm{{s}^{-\,1}}.\]

Now, choose the correct option.

A) After 8s energy is 100% kinetic

B) After 16s energy is 100% kinetic

C) After 6s energy is 100% kinetic

D) After 12s energy is 100% kinetic

Correct Answer: C

Solution :

After 6 s, both pulses overlapps completely.

So, there is no potential energy as

\[{{y}_{net}}=0.\]Hence, energy is 100% kinetic after 6 s.