azendehaulreid azendehaulreid

15-07-2016
Physics

Answered

A train travels at a velocuty of +50 m/s. it takes 8s to slow down to 5 m/s with constant acceleration. What was it's acceleration

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choclateboy650 choclateboy650

15-07-2016

5.635m/s2 is the acceleration of the train

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olemakpadu olemakpadu

16-07-2016

Acceleration = (v - u)/t u = 50m/s, v = 5m/s, t = 8s

= (5 - 50) /8 = -45/8 = -5.625 m/s²

Acceleration = -5.625 m/s², so it actually decelerated by 5.625 m/s² because of the negative sign.

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