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.)

A. 91.3 m/s
B. 56.8 m/s
C. 12.5 m/s
D. 36.0 m/s

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.)

 		A.	91.3 m/s
 		B.	56.8 m/s
 		C.	12.5 m/s
 		D.	36.0 m/s

anonymous · Answer

I just really need help to know how to do it.

anonymous · Answer

Idk how,
 but i got D