An ion travelling east through a biological membrane at 150 m/s enters electric field which reduces its velocity to 100m/s towards the east?

An ion travelling east through a biological membrane at 150 m/s enters electric field which reduces its velocity to 100m/s towards the east. While this acceleration (assumed constant) is occurring, the ion undergoes a displacement of 50.0A in the same direction (1 A = 10^-10m) a) How long did the electric field... show more An ion travelling east through a biological membrane at 150 m/s enters electric field which reduces its velocity to 100m/s towards the east. While this acceleration (assumed constant) is occurring, the ion undergoes a displacement of 50.0A in the same direction (1 A = 10^-10m)
a) How long did the electric field take to cause this velocity change?
b) What acceleration did the ion experience?

Thank you very much. 
1 answer 1