Question

a train starting from rest attains a velocity of 20m/s in 2 minutes. assuming that the acceleration is uniform find.1,the acceleration.2,distance traveled by the train while attained this velocity.

Answer 1

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Answer 2

u (initial velocity)=0 m/s
v (final velocity)=20 m/s
t (time)=2 mins= 2 x 60 =120 seconds
if acceleration is uniform throughout 120 seconds then acceleration a=(v-u)/t
                                                  =(20-0)/120
                                                   =20/120
                                                   = 0.16 m/s^2
Displacement S = ut+1/2at^2
                    =0 x 120 + 1/2 x 0.16 x 120^2
                    =0+1/2 x 0.16 x 14400
                    =0.16 x 7200
                    =1152 m