A reconnaissance plane flies 430 km away from its base at 680 m/s, then flies back to its base at 1020 m/s. what is its average speed? answer in units of m/s.

Question

16-09-2022
Physics

Answered

A reconnaissance plane flies 430 km away from its base at 680 m/s, then flies back to its base at 1020 m/s. what is its average speed? answer in units of m/s.

Answer :

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aditmarkas98 aditmarkas98 · Answer 1 · 2022-09-21T02:12:28-04:00

The average speed of the plane is 816 m/s.

We need to know about the average speed to solve this problem. The average speed can be determined as the total distance divided by the total time. It can be written as

v = d / t

where v is average speed, d is distance and t is time.

From the question above, we know that

d1 = d2 = 430 km

v1 = 680 m/s

v2 = 1020 m/s

Because of the distance is the same, we can calculate the average speed as

v = 2d / (t1 + t2)

v = 2.d / (d/v1 + d/v2)

v = 2/(1/v1 + 1/v2)

v = 2/(1/680 + 1/1020)

v = 816 m/s

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