0.002 m2 क्षेत्रफल वाले पानी का एक जेट 15 m/s के वेग से गतिमान है तथा 6 m/s के वेग से गतिमान ब्लेडों की एक श्रृंखला पर प्रहार करता है। ब्लेडों पर लगाया गया बल ________ होगा।

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UKPSC JE Mechanical 2013 Official Paper II
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  1. 0.18 N
  2. 270 N
  3. 27 N
  4. 180 N

Answer (Detailed Solution Below)

Option 2 : 270 N
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अवधारणा:

जेट द्वारा ब्लेड पर लगाया गया बल निम्न प्रकार दिया जाता है

F = ρAv(v - u)

गणना:

दिया गया है:

A = 0.002 m2, v = 15 m/s, u = 6 m/s, ρ = 1000 kg/m3

F = ρAv(v - u)

F = 1000 × 0.002 × 15(15 - 6)

F = 270 N

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