Question

the amplitude of a shm reduces to 1/3 in first 20 second then in first 40 seconds its amplitude becomes _ ???

Answer 1

the amplitude of shm
In 20 sec ------- > it became 1/3
In 40 sec ------- > y

20×(1/3) = 40×y
20/3 = 40y
y = 20/120
y = 2/12
y = 1/6

hence the amplitude will became 1/6

Answer 2

Answer:

1/9 is correct answer...............? m mm mm mm mm mm mm mm