Question
Asked Oct 23, 2019
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The train tracks on which a train travels exerts a 2.0x10^5 N friction force on the train, causing it to stop in 32s.

Determine the average force needed to stop the train in 25s.

Determine the stoping time interval if the tracks exert a 1.0x10^5 N friction force on the train.

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Expert Answer

Step 1

(a)

Write the expression for distance.

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substitute

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Step 2

Write the expression for velocity.

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V=0 02as 25

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Step 3

Write the expressio...

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substitute a =ma avg avg ag 2s —ту? mv 25 -mv 1 mv OC ave 2x10 N 25 s F 32s F2.56x10 N avg

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Advanced Physics

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