Question

a train brakes from 40m/s to stop over a distance of 100m what is the acceleration
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Answer 1

QUESTION -

A train brakes from 40m/s to stop over a distance of 100m what is the acceleration?

ANSWER -

Using the formula Vf² = Vi² + 2ad,

To find acceleration, we have the formula

a = -Vi² /2d

since, Vf = 0 m/s

a = -Vi² /2d

 =  -(40 m/s)²  / 2 × 100 m

 =  - 1,600 m²/s² / 200 m

 = - 8 m/s²  (negative because ofretardation )

@HarshPratapSingh