Question

Figure shows the roller coaster track. Each car will start from rest at
point A and will roll with negligible friction. It is important that there
should be at least some small positive normal force exerted by the
track on the car at all points, otherwise the car would leave the track.
With the above fact, the minimum safe value for the radius of curvature
at point B is (g = 10 m/s2):
(A) 20 m
(B) 10 m.
(C) 40 m
(D) 25 m
IC 1​

Answer 1

Answer:

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