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In a vertical disc two grooves are made ...

In a vertical disc two grooves are made as shown in figure. AB is a diameter. Two balls are dropped at A one in each groove, simultaneously. Then:

A

Time to each at C is less than that to reach at B

B

Time to reach at C is greater than that to reach at B

C

Time to reach at C equal to that to reach at B

D

The different in time to reach at C and to reach at B may be positive negative or zero depending on `alpha`.

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The correct Answer is:
c
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