Motion of rigid bodies question?????

JEE Advanced 2015 Sample Questions › Mechanics questions › Motion of rigid bodies question?????

A thin rod is held resting on the ground with its length inclined at an angle Ï† to the horizontal.The coefficient of friction between rod and ground is K.Show that when the rod is let go it will start slipping on the ground if k<( 3sin Ï† cos Ï†)/(1+3sin²Ï†)

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pranjal028 ·2011-10-12 20:36:00

Anyone help please?
I have calculated Ï‰.Now how to proceed further??

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Vivek @ Born this Way ·2011-10-13 05:19:34

Calculated w ?

You need to write all the forces acting on the rod when it is left, then find Î± (Angular Acceleration)/ From there put it in any of the equations obtained to find f_riction.

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Basic Integral Calculus Operators Symbols Matrix Cases

√ √ || {} [] () → ~ ^ x x x → → ln log lg lim lim cos sin tan cot arcsin arccos arctan

∫ ∫ ∫ ∫ ∫ ∬ ∬ ∬ ∬ ∬ ∭ ∭ ∭ ∭ ∭ ⨌ ⨌ ⨌ ⨌ ⨌

∑ ∑ ∑ ∑ ∑ ∮ ∮ ∮ ∮ ∮ ∏ ∏ ∏ ∏ ∏ ∐ ∐ ∐ ∐ ∐

+ - × ÷ ± ∓ = ∪ ∩ ≠ ∼ ≈ ∅ ∀ ∃ ∈ ∋ ∝ ≤ ≥ ≃ ≅ ≡ < > ≪ ≫ ⊂ ∉ ⊃ ⊆ ⊇ ⇒ ⇐ ⇔ ⇒ ⇐ ⇔ ⇑ ⇓ ⇕ → ← ↔ → ← ↔ ↑ ↓ ↕ ↖ ↗ ↘ ↙ ↪ ↩ ⇀ ↼ ⇁ ↽

° ∂ ∞ α β γ δ θ λ μ ν ξ π ρ σ φ ω ε ƒ κ τ υ Γ Δ Λ Σ Π Ω

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Motion of rigid bodies question?????

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