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(a)A light-rail commuter train accelerates at a rate of 1.45 m/s2. How long (in s) does...

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Physics

(a)A light-rail commuter train accelerates at a rate of 1.45m/s2. How long (in s) does it take to reach its topspeed of 80.0 km/h, starting from rest?

s

(b)The same train ordinarily decelerates at a rate of 1.95m/s2. How long (in s) does it take to come to a stopfrom its top speed?

s

(c)In emergencies the train can decelerate more rapidly, comingto rest from 80.0 km/h in 8.30 s. What is its emergencydeceleration in m/s2?

m/s2

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