Question

A roller coaster has a mass of 425 kg. It sits at the top of a hill with height 66 m. If it drops from this hill, how fast is it going when it reaches the bottom? (Assume there is no air resistance or friction.)

Answer 1

mgh = mv²/2
v=sqrt{2gh}

Answer 2

25

Answer 3

36.0 m/s

Answer 4

thank you ih