Mathematics · Fluid Mechanics Calculations
A shaft is rotating inside a sleeve and the gap between them is filled with a Newtonian fluid. When a force is applied parallel to the shaft axis, the speed increases from 80 cm/s to 150 cm/s. If the force required for a speed of 80 cm/s is 600 N, what is the percentage increase in force required to attain 150 cm/s?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 150%
- 262.5%
- 387.5%✓
- 475%
Correct answer
87.5%
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