Question

A train moving with velocity of 54 km per hour is acceleration so that its velocity becomes 72 km/hr in 15 hr find the acceleration of the trains

Answer 1

let a be the acceleration 

72 kph - 54 kph = a*(15 secs) 

18 kph = 15a(secs) 

let's now convert 18 kph to m/s 

18 km/hr x (1 hr/3,600 secs) x (1,000 m/1 km) = 5 m/s 

5 m/s = 15a(secs) 

1/3 m/s^2 = a ---> final answer!