Question

7. Kevin is flying to London from New York. The concord attains a final speed of 90 m/s after accelerating from 5.2 m/s at a rate of 10.6 m/s?. How long did the concord accelerate?

Answer 1

Answer: 8 Seconds

Explanation: In this situation Vf = 90 (Speed on impact which in this case just means final speed) Vi = 5.2 (Initial speed) and A = 10.6 (Acceleration)
We need to find T(Time)

Plugging in the numbers we have into this equation: Vf = Vi + AT
Will give us 90 = 5.2 + 10.6T
Take 5.2 away from both sides -> 84.8 = 10.6T
And finally divide 10.6 from both sides for your answer in seconds
T=8