Answer
h = 1.12 m
Step-by-step explanation:
given,
mass of the car = 2 kg
radius = 0.5 m
let h be the height of the ramp
when the car reaches at the top point
gravity = centripetal force



using conservation of energy






h = 1.12 m
hence, height of the ramp should be greater than 1.12 m so that it can complete the loop.