Which is an example of potential energy? a. a swimmer kicking their legs b. a car driving on the road c. an arrow flying at a target d. a yo-yo in someone’s hand

A yo-yo in someones hand

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."