Question

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

Answer 1

You can use equations of motion to solve

Let initial velocity (u) = 600km/h

Acceleration (a) = +10km/h per second = 36000km/h²

Final velocity (v) = 1100 km/h

v = u + at

Plugging the respective values

1100 = 600 + 36000(t)

1100 - 600 = 36000t

Solving for t

t = 0.1388 hrs = 0.8333 minutes = 50 seconds

So time taken to reach barrier = 50 seconds


Thanks

Answer 2

Hello friend...

You can use the formula

v=u+at

It can help you in solving this question...

Hope this helps you...