Question

A train starting from railway station attains a speed of 21 m/s in one minute. Find its acceleration.​

Answer 1

Answer: 0.35m/s²

Explanation:The initial value of v is 0 and final value is 21m/s In one minute or 60 seconds so.

Vi =0 m/s

Vf= 21m/s

t = 60 s

a = ( Vf-Vi) / t

= 21-0/60

= 21/60

=0.35m/s²

Answer 2

Answer:

initial velocity of train = 0

final velocity of train = 21 m/s

time taken = 1minutes = 60 sec

Thus,

acceleration = change In velocity/time

= ( 21-0)/60 = 21/60 = 7/20 m/s²