Until a train is a safe distance from the station it must travel at 5 m/s. Once the train is on open track it can speed up to 45 m/s. If it takes a train 8 seconds to reach 45 m/s, what is the acceleration of the train? (Round your answer to the nearest whole number.)

A) 4 m/s2

B) 5 m/s2

C) 6 m/s2

D) 7 m/s2

Question

Mathematics

Zayne Greer

11 July, 15:32

Until a train is a safe distance from the station it must travel at 5 m/s. Once the train is on open track it can speed up to 45 m/s. If it takes a train 8 seconds to reach 45 m/s, what is the acceleration of the train? (Round your answer to the nearest whole number.)

A) 4 m/s2

B) 5 m/s2

C) 6 m/s2

D) 7 m/s2

+4

Answers (2)

Know the Answer?

Makenzie Cuevas · Answer 1

The correct answer is B) 5 m/s ².

Explanation:

To find acceleration, we find the ratio of the change in velocity to the change in time. The change in velocity is 45-5=40. It takes 8 seconds, so the change in time is 8. 40/8=5.

Gilberto Meyers · Answer 2

The answer is 5 because acceleration=change speed/change time

change time=8

change speed=45-5=40

40/8=5

5 m/s^2 is acceleration