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MCQ
For a roller coaster to stay on the track while completing a vertical loop of radius 3.6 m, the minimum speed at the top is (g = 10 m/s^2):
Unit-4 Dynamics-2
A 6 m/s
B 3.6 m/s
C 12 m/s
D 36 m/s
Explanation

v = sqrt(g*r) = sqrt(10 x 3.6) = sqrt(36) = 6 m/s.

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