Wave Mechanics Question 656
Question: 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 s, the total energy of the pulses will be
Options:
A) Zero
B) Purely kinetic
C) Purely potential energy
D) Partly kinetic and partly potential
Show Answer
Answer:
Correct Answer: B
Solution:
After 2 s, each wave travels a distance $ =2,\times 2=4,\text{m}. $ The wave shape is shown in figure. Thus energy is purely kinetic.
BETA
