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A car is moving up with uniform speed along a fly over bridge which is part of a vertical circle. The true statement from the following is

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Normal reaction on the car gradually decreases and becomes minimum at highest position of bridge

Normal reaction on the car gradually increases and becomes maximum at highest position

Normal reaction on car does not change

Normal reaction on the car gradually decreases and becomes zero at highest position

answer is A.

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Detailed Solution

Normal reaction at the highest point of bridge = $m g - \frac{m v^{2}}{r}$

Hence, Normal reaction decreases while the particle moves from the bottom of the vertical circle to the top of the vertical circle.

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