A Roller Coaster Has a Vertical Loop with Radius 29

Multiple Choice

A roller coaster has a vertical loop with radius 29.5 m.What is the minimum speed of the roller coaster car can have at the top of the loop if the passengers do not lose contact with the seats?

A) 10.0 m/s
B) 14.0 m/s
C) 17.0 m/s
D) 19.0 m/s