A man sets his watch by a whistle that is 2, | vedclass

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(D) The sound of the whistle takes a finite amount of time to travel from the source to the man.Given distance $d = 2\, km = 2000\, m$.Speed of sound

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$6\, s$ slow

Vedclass · Answer

(D) The sound of the whistle takes a finite amount of time to travel from the source to the man.Given distance $d = 2\, km = 2000\, m$.Speed of sound $v = 330\, m/s$.The time taken by the sound to reach the man is $t = \frac{d}{v}$.$t = \frac{2000}{330} \approx 6.06\, s \approx 6\, s$.Since the sound takes $6\, s$ to reach the man,he will hear the whistle $6\, s$ after it is blown. Consequently,he will set his watch $6\, s$ late,meaning his watch will be $6\, s$ slow.

$A$ man sets his watch by a whistle that is $2\, km$ away. How much will his watch be in error? (Speed of sound in air = $330\, m/s$)

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