When an object moves in a circle, acts to accelerate the object toward the center of that circle

answer would be d.) i hope this

explanation:

1 a

2 b

3 b

4 d

5 d

6 d

explanation:

the first american roller coaster was the mauch chunk switchback railway, built in the mountains of pennsylvania in the mid-1800s. the track, originally built to send coal to a railway, was reconfigured as a "scenic tour."