A roller coaster starts at the top of a hill at v1 =0m/s at a time of t1=0/s . When it reaches the bottom of the hill at t2=6/s it has a velocity of v2=36m/s.what is the roller coaster’s acceleration?



A=-6m/s^2

B=36m/s^2

C=6m/s^2

D=0m/s ^2