Fluid Mechanics

JEE Main 2015 Coaching › Mechanics questions › Fluid Mechanics

A body floats in complete immersed condition in water as shown as in figure.As the whole system is allowed to slide down freely along the inclined surface,the magnitude of buoyant force
(a)remains unchanged
(b)increases
(c)decreases
(d)becomes zero
Ans is (c)..Give the reason

#Physics #Mechanics

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2 Answers

486

Niraj kumar Jha ·2013-03-09 06:51:00

The body moves downwards with an acc. of mgcosÎ¸ whereas previously it was at rest so buoyant force must have decreased.
b=mg(1-cosÎ¸)

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158

Anik Chatterjee ·2013-03-09 06:54:00

ok thanks

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Your Answer

Basic Integral Calculus Operators Symbols Matrix Cases

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

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

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

° ∂ ∞ 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