The motor of an electric train can give it an acceleration of 1 ms−2 and brakes can give a negative acceleration of 3 ms−2. The shortest time in which the train can make a trip between the two stations 1215 m apart is

April 14, 2022

by Ezee_Notes

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Physics Problems

Question : The motor of an electric train can give it an acceleration of 1 ms−2 and brakes can give a negative acceleration of 3 ms−2. The shortest time in which the train can make a trip between the two stations 1215 m apart is

(A) 113.6 s

(B) 56.9 s

(D 55 s

Answer : option (B)

Solution :

The motor of an electric train can give it an acceleration of 1 ms−2 and brakes can give a negative acceleration of 3 ms−2. The shortest time in which the train can make a trip between the two stations 1215 m apart is