Question

An aircraft travelling at 600 km/ h accelerates steadily at 10 km/ h per second. Taking the speed of sound as 1100km/h at the aircraft altitude, how long will it take to reach the ' sound barrier'?

Answer 1

initial velocity =600km/h
Final velocity =1100km/h
Acceleration =10km/h per second
Let time taken be t
Using acceleration formula
a=(v-u)/t
10 =(1100-600)/ t
10t = 500
t= 50s
So, the time taken by the body to reach the sound barrier will be 50s.

Answer 2

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speed of sound = 1100 km/hr

v = u + a t

t = (v - u) / a = (1100 - 600 ) / 10 = 50 s

I hope, this will help you

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