A construction workers helmet slips and falls when he is 78 4 m above the ground He hears the - Science - Sound

Question

A construction workers helmet slips and falls when he is 78 4 m
above the ground He hears the sound of the helmet hitting the
ground 4 23 second after it slipped find the speed of sound in air

Vaisnav Ashok · Accepted Answer

Ans: initial velocity = 0
Using 2nd equation of motion, we get
78 4 = 0 + 1/2 * 9 8 * t2
==> t = root16 = 4
==> Difference = 4 23 - 4 00
= 0 23 sec
==> speed of sound = 78 4 / 0 23 = 340 86 m/s
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A construction workers helmet slips and falls when he is 78.4 m above the ground. He hears the sound of the helmet hitting the ground 4.23 second after it slipped. find the speed of sound in air.