Question

The fastest airplane is the Lockheed SR-71. If an SR-71 flies 15.0 km west in 15.3 s, what is its average velocity in kilometers per hour?

Answer 1

3529 km/h west

Step-by-step explanation:

The average velocity is given by:

`v=(d)/(t)`

where

d is the displacement

t is the time taken

For the plane in this problem, we have:

`d=15.0 km`

`t=15.3 s \cdot (1)/(3600 s/h)=0.00425 h`

Therefore, substituting into the formula,

`v=(15.0)/(0.00425)=3529 km/h`

and the direction is the same as the displacement (west).