Flywheel turned by a pull on a cordडोरी के खिंचाव से घूमता गतिपालक पहिया

NCERT Fig 6.31 · interactive diagram

Parts and their functions

• Flywheel (uniform disc) (गतिपालक पहिया (एकसमान चकती)) — M = 20 kg, I = ½MR² = ½ × 20 × 0.2² = 0.4 kg m².
• Frictionless axle (घर्षणरहित धुरी) — Fixed axis: only the torque about it matters.
• Radius R = 0.2 m (त्रिज्या R = 0.2 m) — Moment arm of the pull.
• Cord wound on the rim (परिधि पर लिपटी डोरी) — Unwinding 2 m turns the wheel by θ = 2/0.2 = 10 rad.
• Steady pull F = 25 N (स्थिर खिंचाव F = 25 N) — τ = FR = 5 N m; work done for 2 m = 25 × 2 = 50 J.
• Angular acceleration α (कोणीय त्वरण α) — α = τ/I = 12.5 rad s⁻²; ω² = 2αθ = 250 ⇒ K = ½Iω² = 50 J = work done.

Original diagram drawn by Simple Learning Hub, based on NCERT Fig 6.31. Report a mistake