Does anyone know the answer to this?

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."

a skateboard rolling across the street - apex

490 n

f=125n a=2.5m/s2

365.25 earth days are in the year of a light year