Question

5. A vibrating turning fork generates a wave
given by y = 0.1 sin a(0.1x – 2t) where x, y
are in meters and t is in seconds. The distance
travelled by the wave while the fork completes
30 vib is
1) 600 m
2) 20 m
3) 36 m
4) 200 m
:.1
1
time
+​

Answer 1

Answer: Correct option is

D

33m

Given,

Frequency=200Hz

Speed of sound =330m/s

Number of vibrations=20

therefore,Time period=  

frequency

1

​

=  

200

1

​

=0.005sec

Total time= Time period × number of vibrations

=0.005×20=0.1sec

Now,

Distance travelled= Speed × time

=330×0.1=33m