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A flywheel connected to a punching machine has to supply energy of 400 Nm while running at a mean angular speed of 20 rad/s. If the total fluctuation of speed is not to exceed ± 2% the mass moment of inertia of the flywheel in kg-m² is
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- 25
- 50
- 100
- 125
Correct Option: A
ΔE = 400Nm
ωmean = 20 rad/s
CS = ± 2%
| = 2 × | = 0.04 | |
| 100 |
ΔE = Iω²meanCS
400 = I(20)² × 0.04
I = 25 kg-m²
