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Question

Water drops fall at regular intervals from a tap which is 5m 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 mHeight from ground = 5mTime taken by first drop to reach the ground $t=\sqrt{\frac{2h}{g}}$$t=\sqrt{\frac{2×5}{10}}$⇒ t = 1secThe third drop is leaving the tap at the instant the first drop touches the ground. As the water drops fall at regular intervals from a tap therefore time difference between any two drops is1/2 sec

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