Question

A pilot decreases the landing speed from 70 m/s to 7 m/s in 30 seconds. What was the acceleration of the plane?

Answer 1

-2.1 m/s²

Step-by-step explanation:

a = Δv/Δt = (7 m/s - 70 m/s) / 30 s = -2.1 m/s²

the (-) sign on the acceleration means the plan is slowing down (decelerating)