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Water from a tap emerges vertically downwards with an initial speed of 1.0 ms –1 . The cross-sectional area of the tap is 10 –4 m 2 . Assume that the pressure is constant throughout the stream of water and that the flow is streamlined. The cross-sectional area of the stream, 0.15 m below the tap would be : (Take g = 10 ms –2 )

1. 5 × 10 –4 m 2
2. 2 × 10 –5 m 2
3. 5 × 10 –5 m 2
4. 1 × 10 –5 m 2

Correct answer: 5 × 10 –5 m 2

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