Speed is the distance travelled by an object whereas velocity is distance travelled by an object per unit time in a given direction.
hey guy
the vibration per second is frequency
then for 20 vibration time taken is 100 second
in 1 second 20/100 vibration took place
it means 0.2 is frequency
for time period , we have
t=1/f
=1/0.2
=5
Answer:
can't explain but is correct
