The maximum possible acceleration of a train moving on a straight track is $10\ m/s^2$ and maximum possible retardation is $5 \ m/s^2.$ If maximum achievable speed of train is $10\ m/s$ then minimum time in which train can complete a journey of $135\ m$ starting from rest and ending at rest, is.........$s$
The maximum possible acceleration of a train moving on a straight track is $10\ m/s^2$ and maximum possible retardation is $5 \ m/s^2.$ If maximum achievable speed of train is $10\ m/s$ then minimum time in which train can complete a journey of $135\ m$ starting from rest and ending at rest, is.........$s$
- A
$5$
- B
$10$
- C
$15$
- D
$20$
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