Block on a rough inclined planeखुरदरे आनत तल पर गुटका

NCERT Fig 4.11 · interactive diagram

Parts and their functions

• Inclined plane (आनत तल) — Rough surface; slowly tilted until the block just starts to slide.
• Angle of incline θ (आनत कोण θ) — At θ_max the block just slides: tan θ_max = μₛ. NCERT Example 4.8: θ = 15° ⇒ μₛ = tan 15° = 0.27.
• Block of mass m (m द्रव्यमान का गुटका) — θ_max does not depend on m.
• Weight mg (भार mg) — Acts vertically down; resolve it along and perpendicular to the plane.
• Normal force N (अभिलंब बल N) — Perpendicular to the surface: N = mg cos θ.
• Static friction fₛ (स्थैतिक घर्षण fₛ) — Up the plane, opposing impending motion; self-adjusting: fₛ = mg sin θ ≤ μₛN.
• mg sin θ (down the plane) (mg sin θ (तल पर नीचे)) — The part of weight trying to slide the block; balanced by fₛ.
• mg cos θ (into the plane) (mg cos θ (तल में)) — Balanced by the normal force N.

Original diagram drawn by Simple Learning Hub, based on NCERT Fig 4.11. Report a mistake