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Question

# Water drops fall at regular intervals from a tap which is above the ground. The third drop is leaving the tap at the instant the first drop touches the ground. How far above the ground is the second drop at that instant

A
2.50 m
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B
3.75 m
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C
4.00 m
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D
1.25 m
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Solution

## The correct option is B 3.75 mTime taken by first drop to reach the ground t=√2hg ⇒ t=√2×510=1sec As the water drops fall at regular intervals from a tap therefore time difference between any two drops =12sec In this given time, distance of second drop from the tap =12g(12)2=54=1.25m Its distance from the ground 5−1.25=3.75m

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