Balancing a seesaw (lever principle)सी-सॉ का संतुलन (उत्तोलक सिद्धांत)

NCERT Fig 7.34 · interactive diagram

Parts and their functions

• Lighter child, longer arm (हल्का बच्चा, लंबी भुजा) — 15 kg at 2 m: 15 × 2 = 30 kg m.
• Heavier child, shorter arm (भारी बच्चा, छोटी भुजा) — 30 kg at 1 m: 30 × 1 = 30 kg m — equal, so it balances.
• Lever principle (उत्तोलक का सिद्धांत) — effort × effort arm = load × load arm (F₁d₁ = F₂d₂). Twice the weight sits at half the distance (Exercise 9).

Original diagram drawn by Simple Learning Hub, based on NCERT Fig 7.34. Report a mistake