A stone is dropped from a 50 m tall building into a pond. when is sound of splash heard at the top? (g=10m/s2 , speed of sound in air= 340m/s)?
Answers
Answered by
77
h=50m
g= 10m/s2
v= 340 m/s
t=?
s=d/t
340 = 50/t
t= 50/340
t= 5/34
g= 10m/s2
v= 340 m/s
t=?
s=d/t
340 = 50/t
t= 50/340
t= 5/34
Answered by
93
Sound will take time to first get produced and then to reach us.
Time taken by sound to hit the pond,
s = ut + ½ at²
50 m = (0)t + ½ × 10 × t²
10 m = t²
√10 m = 3.16 m = time
Time taken by sound to reach from pond to us,
t = d / s = 50 m / 340 m/s
= 0.14 s
Total time taken by sound to reach us,
= 3.14 s + 0.14 s = 3.3 seconds
➣ Answer : 3.3 seconds
Time taken by sound to hit the pond,
s = ut + ½ at²
50 m = (0)t + ½ × 10 × t²
10 m = t²
√10 m = 3.16 m = time
Time taken by sound to reach from pond to us,
t = d / s = 50 m / 340 m/s
= 0.14 s
Total time taken by sound to reach us,
= 3.14 s + 0.14 s = 3.3 seconds
➣ Answer : 3.3 seconds
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