If a speeding train hits the brakes and it takes the train 39 seconds to go from 54.8 m/s to 12 m/s what is the acceleration?

Question

Physics

Maxim Sutton

15 February, 12:52

If a speeding train hits the brakes and it takes the train 39 seconds to go from 54.8 m/s to 12 m/s what is the acceleration?

+3

Answers (2)

Know the Answer?

Phoenix Avila · Answer 1

Answer:1.097 m/s^2

Explanation:

a = (final velocity - initial velocity) / time

= (54.8-12) / 39

=1.097 m/s^2

Kirsten Campos · Answer 2

-1.09m/sec^2

Explanation:

Acceleration = (Vf-Vi) / Time

=12-54.8

= - 42.8

= - 42.8/39

=-1.09

-ve sign is due to recoil of train

as it suddenly hits brakes.