A train running along a straight track at 30 m/s is slowed uniformly to ...

A train running along a straight track at 30 m/s is slowed uniformly to a stop in 45 s. Find the acceleration and stopping distance.

a. -0.67 m/s2, 671.63 m

b. 0.67 m/s2, 571.63 m 

c. -0.57 m/s2, 471.63 m 

d. 0.57 m/s2, 371.63 m