Question

(a) A light-rail commuter train accelerates at a rate of . How long (in s) does it takes to reach its top speed of , starting from rest?

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(b) The same train ordinarily decelerates at a rate of . How long (in s) does it takes to come to a stop from its speed?

_ _ _ _ _ s

(c) In emergencies the train can decelerate more rapidly, coming to rest from in . What is its emergency deceleration in ?

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