Just A Second....

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(1) Which of the following is/are INCORRECT about kinetic friction ?

(A) always acts in opposite direction of the applied force
(B) total work done by this friction force on the system may be zero
(C) direction of friction is always opposite to direction of velocity
(D) it can increase velocity

#Physics #General Physics

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6 Answers

akari ·2010-01-17 09:44:11

A ) c) ?????

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UTTARA ·2010-01-17 09:46:09

ANS : A B C

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akari ·2010-01-17 09:48:26

ok
yes it can never be 0 , always negative ,sorry 4 creating confusion

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UTTARA ·2010-01-17 09:49:30

y is C incorrect ???????

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akari ·2010-01-17 09:54:50

cAN BE SAME
SEE THIS

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UTTARA ·2010-01-17 10:03:13

Ya u're right

thanks

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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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