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A sprue in a sand mould has a top diameter of 20 mm and height of 200 mm. The velocity of the molten metal at the entry of the sprue is 0.5 m/s. Assume acceleration due to gravity as 9.8 m/s2 and neglect all losses, If the mould well ventilated, the velocity (upto 3 decimal points accuracy) of the molten metal at the bottom of the sprue is ______ m/s.
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- 2.034
- 3.043
- 2.043
- 2.045
Correct Option: C
We know that,
V2 = √2gh2 = √2 × 9.81 × h2 = 0.5
h2 = 0.01274 m
h3 = h2 + 0.2 = 0.2127 m
V3 = √2gh3 = 2.043 m/sec
