A car goes over a hill whose crest has a radius of curvature of 30 m (two significant figures). It's travelling at const

[answerhappygod]

A car goes over a hill whose crest has a radius of curvature of
30 m (two significant figures). It's travelling at constant speed
and we shall neglect aerodynamic forces. Treat the car as a
particle. (i.e. neglect the size of the car in comparison with the
size of the hill.) At the very highest point, how fast does it have
to travel so that it becomes airborne at that point? (Hints: what
shaped path? and what is the maximum downwards acceleration it can
have? BTW, the photo does not represent the shape of a real
hill.)
Important: Answer this question theoretically,
not experimentally!
Speed to become airborne: _____ kph.