A fly-over bridge is a part of a vertical circle of radius 80m and a vehicle is travelling on it. The vehicle does not leave the surface of bridge at its highest point, if maximum speed of vehicle is:
A
14m/s
B
21m/s
C
28m/s
D
42m/s
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Solution
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For the vehicle not to leave the surface, it has to travel with critical velocity. So, v=√gR =√9.8×80 =√784 or, v=28ms−1
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