qn from mtg magazine.

BITSAT 2015 Questions › Mechanics questions › qn from mtg magazine.

1)Consider a solid cube of uniform charge density.What is the ration of the electrostatic potential at a corner to that at the center?(Take the potential to be zero at infinity)

2)A motorcyclist wishes to travel in a circle of radius R.The coefficient of static friction between the tires and the (horizontal) ground is constant.The motorcycle starts at rest.What is the minimum distance the motorcycle must travel in order to achieve its maximum allowable speed( that is ,The speed above which it must skid out of the path)

pls give reqd hints for solving these two.

#Physics #Mechanics

UP 0 DOWN 0 0 3
Post on FacebookPost anonymously?

3 Answers

3

msp ·2009-09-11 04:17:58

ne replis do ur comments pls.

UP 0 DOWN 0
Post on FacebookPost anonymously?

3

msp ·2009-09-16 05:58:15

neone.

UP 0 DOWN 0
Post on FacebookPost anonymously?

1

Anirudh Kumar ·2009-09-16 06:53:29

2)

assume constant tangential acceleration a m/s²

now ,
net acceleration
is

âˆša²+v²/R
= âˆša²+a²t²/R
=ug

find time from this then use the formula

s= 0*t+at²/2

UP 0 DOWN 0
Post on FacebookPost anonymously?

Your Answer

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